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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     * <a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     * <a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.io;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.io.File;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.util.ArrayList;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.util.Collection;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.util.Stack;<a name="line.22"></a>
<FONT color="green">023</FONT>    <a name="line.23"></a>
<FONT color="green">024</FONT>    /**<a name="line.24"></a>
<FONT color="green">025</FONT>     * General filename and filepath manipulation utilities.<a name="line.25"></a>
<FONT color="green">026</FONT>     * &lt;p&gt;<a name="line.26"></a>
<FONT color="green">027</FONT>     * When dealing with filenames you can hit problems when moving from a Windows<a name="line.27"></a>
<FONT color="green">028</FONT>     * based development machine to a Unix based production machine.<a name="line.28"></a>
<FONT color="green">029</FONT>     * This class aims to help avoid those problems.<a name="line.29"></a>
<FONT color="green">030</FONT>     * &lt;p&gt;<a name="line.30"></a>
<FONT color="green">031</FONT>     * &lt;b&gt;NOTE&lt;/b&gt;: You may be able to avoid using this class entirely simply by<a name="line.31"></a>
<FONT color="green">032</FONT>     * using JDK {@link java.io.File File} objects and the two argument constructor<a name="line.32"></a>
<FONT color="green">033</FONT>     * {@link java.io.File#File(java.io.File, java.lang.String) File(File,String)}.<a name="line.33"></a>
<FONT color="green">034</FONT>     * &lt;p&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>     * Most methods on this class are designed to work the same on both Unix and Windows.<a name="line.35"></a>
<FONT color="green">036</FONT>     * Those that don't include 'System', 'Unix' or 'Windows' in their name.<a name="line.36"></a>
<FONT color="green">037</FONT>     * &lt;p&gt;<a name="line.37"></a>
<FONT color="green">038</FONT>     * Most methods recognise both separators (forward and back), and both<a name="line.38"></a>
<FONT color="green">039</FONT>     * sets of prefixes. See the javadoc of each method for details.<a name="line.39"></a>
<FONT color="green">040</FONT>     * &lt;p&gt;<a name="line.40"></a>
<FONT color="green">041</FONT>     * This class defines six components within a filename<a name="line.41"></a>
<FONT color="green">042</FONT>     * (example C:\dev\project\file.txt):<a name="line.42"></a>
<FONT color="green">043</FONT>     * &lt;ul&gt;<a name="line.43"></a>
<FONT color="green">044</FONT>     * &lt;li&gt;the prefix - C:\&lt;/li&gt;<a name="line.44"></a>
<FONT color="green">045</FONT>     * &lt;li&gt;the path - dev\project\&lt;/li&gt;<a name="line.45"></a>
<FONT color="green">046</FONT>     * &lt;li&gt;the full path - C:\dev\project\&lt;/li&gt;<a name="line.46"></a>
<FONT color="green">047</FONT>     * &lt;li&gt;the name - file.txt&lt;/li&gt;<a name="line.47"></a>
<FONT color="green">048</FONT>     * &lt;li&gt;the base name - file&lt;/li&gt;<a name="line.48"></a>
<FONT color="green">049</FONT>     * &lt;li&gt;the extension - txt&lt;/li&gt;<a name="line.49"></a>
<FONT color="green">050</FONT>     * &lt;/ul&gt;<a name="line.50"></a>
<FONT color="green">051</FONT>     * Note that this class works best if directory filenames end with a separator.<a name="line.51"></a>
<FONT color="green">052</FONT>     * If you omit the last separator, it is impossible to determine if the filename<a name="line.52"></a>
<FONT color="green">053</FONT>     * corresponds to a file or a directory. As a result, we have chosen to say<a name="line.53"></a>
<FONT color="green">054</FONT>     * it corresponds to a file.<a name="line.54"></a>
<FONT color="green">055</FONT>     * &lt;p&gt;<a name="line.55"></a>
<FONT color="green">056</FONT>     * This class only supports Unix and Windows style names.<a name="line.56"></a>
<FONT color="green">057</FONT>     * Prefixes are matched as follows:<a name="line.57"></a>
<FONT color="green">058</FONT>     * &lt;pre&gt;<a name="line.58"></a>
<FONT color="green">059</FONT>     * Windows:<a name="line.59"></a>
<FONT color="green">060</FONT>     * a\b\c.txt           --&gt; ""          --&gt; relative<a name="line.60"></a>
<FONT color="green">061</FONT>     * \a\b\c.txt          --&gt; "\"         --&gt; current drive absolute<a name="line.61"></a>
<FONT color="green">062</FONT>     * C:a\b\c.txt         --&gt; "C:"        --&gt; drive relative<a name="line.62"></a>
<FONT color="green">063</FONT>     * C:\a\b\c.txt        --&gt; "C:\"       --&gt; absolute<a name="line.63"></a>
<FONT color="green">064</FONT>     * \\server\a\b\c.txt  --&gt; "\\server\" --&gt; UNC<a name="line.64"></a>
<FONT color="green">065</FONT>     *<a name="line.65"></a>
<FONT color="green">066</FONT>     * Unix:<a name="line.66"></a>
<FONT color="green">067</FONT>     * a/b/c.txt           --&gt; ""          --&gt; relative<a name="line.67"></a>
<FONT color="green">068</FONT>     * /a/b/c.txt          --&gt; "/"         --&gt; absolute<a name="line.68"></a>
<FONT color="green">069</FONT>     * ~/a/b/c.txt         --&gt; "~/"        --&gt; current user<a name="line.69"></a>
<FONT color="green">070</FONT>     * ~                   --&gt; "~/"        --&gt; current user (slash added)<a name="line.70"></a>
<FONT color="green">071</FONT>     * ~user/a/b/c.txt     --&gt; "~user/"    --&gt; named user<a name="line.71"></a>
<FONT color="green">072</FONT>     * ~user               --&gt; "~user/"    --&gt; named user (slash added)<a name="line.72"></a>
<FONT color="green">073</FONT>     * &lt;/pre&gt;<a name="line.73"></a>
<FONT color="green">074</FONT>     * Both prefix styles are matched always, irrespective of the machine that you are<a name="line.74"></a>
<FONT color="green">075</FONT>     * currently running on.<a name="line.75"></a>
<FONT color="green">076</FONT>     * &lt;p&gt;<a name="line.76"></a>
<FONT color="green">077</FONT>     * Origin of code: Excalibur, Alexandria, Tomcat, Commons-Utils.<a name="line.77"></a>
<FONT color="green">078</FONT>     *<a name="line.78"></a>
<FONT color="green">079</FONT>     * @author &lt;a href="mailto:burton@relativity.yi.org"&gt;Kevin A. Burton&lt;/A&gt;<a name="line.79"></a>
<FONT color="green">080</FONT>     * @author &lt;a href="mailto:sanders@apache.org"&gt;Scott Sanders&lt;/a&gt;<a name="line.80"></a>
<FONT color="green">081</FONT>     * @author &lt;a href="mailto:dlr@finemaltcoding.com"&gt;Daniel Rall&lt;/a&gt;<a name="line.81"></a>
<FONT color="green">082</FONT>     * @author &lt;a href="mailto:Christoph.Reck@dlr.de"&gt;Christoph.Reck&lt;/a&gt;<a name="line.82"></a>
<FONT color="green">083</FONT>     * @author &lt;a href="mailto:peter@apache.org"&gt;Peter Donald&lt;/a&gt;<a name="line.83"></a>
<FONT color="green">084</FONT>     * @author &lt;a href="mailto:jefft@apache.org"&gt;Jeff Turner&lt;/a&gt;<a name="line.84"></a>
<FONT color="green">085</FONT>     * @author Matthew Hawthorne<a name="line.85"></a>
<FONT color="green">086</FONT>     * @author Martin Cooper<a name="line.86"></a>
<FONT color="green">087</FONT>     * @author &lt;a href="mailto:jeremias@apache.org"&gt;Jeremias Maerki&lt;/a&gt;<a name="line.87"></a>
<FONT color="green">088</FONT>     * @author Stephen Colebourne<a name="line.88"></a>
<FONT color="green">089</FONT>     * @version $Id: FilenameUtils.java 1004077 2010-10-04 00:58:42Z niallp $<a name="line.89"></a>
<FONT color="green">090</FONT>     * @since Commons IO 1.1<a name="line.90"></a>
<FONT color="green">091</FONT>     */<a name="line.91"></a>
<FONT color="green">092</FONT>    public class FilenameUtils {<a name="line.92"></a>
<FONT color="green">093</FONT>    <a name="line.93"></a>
<FONT color="green">094</FONT>        /**<a name="line.94"></a>
<FONT color="green">095</FONT>         * The extension separator character.<a name="line.95"></a>
<FONT color="green">096</FONT>         * @since Commons IO 1.4<a name="line.96"></a>
<FONT color="green">097</FONT>         */<a name="line.97"></a>
<FONT color="green">098</FONT>        public static final char EXTENSION_SEPARATOR = '.';<a name="line.98"></a>
<FONT color="green">099</FONT>    <a name="line.99"></a>
<FONT color="green">100</FONT>        /**<a name="line.100"></a>
<FONT color="green">101</FONT>         * The extension separator String.<a name="line.101"></a>
<FONT color="green">102</FONT>         * @since Commons IO 1.4<a name="line.102"></a>
<FONT color="green">103</FONT>         */<a name="line.103"></a>
<FONT color="green">104</FONT>        public static final String EXTENSION_SEPARATOR_STR = Character.toString(EXTENSION_SEPARATOR);<a name="line.104"></a>
<FONT color="green">105</FONT>    <a name="line.105"></a>
<FONT color="green">106</FONT>        /**<a name="line.106"></a>
<FONT color="green">107</FONT>         * The Unix separator character.<a name="line.107"></a>
<FONT color="green">108</FONT>         */<a name="line.108"></a>
<FONT color="green">109</FONT>        private static final char UNIX_SEPARATOR = '/';<a name="line.109"></a>
<FONT color="green">110</FONT>    <a name="line.110"></a>
<FONT color="green">111</FONT>        /**<a name="line.111"></a>
<FONT color="green">112</FONT>         * The Windows separator character.<a name="line.112"></a>
<FONT color="green">113</FONT>         */<a name="line.113"></a>
<FONT color="green">114</FONT>        private static final char WINDOWS_SEPARATOR = '\\';<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>        /**<a name="line.116"></a>
<FONT color="green">117</FONT>         * The system separator character.<a name="line.117"></a>
<FONT color="green">118</FONT>         */<a name="line.118"></a>
<FONT color="green">119</FONT>        private static final char SYSTEM_SEPARATOR = File.separatorChar;<a name="line.119"></a>
<FONT color="green">120</FONT>    <a name="line.120"></a>
<FONT color="green">121</FONT>        /**<a name="line.121"></a>
<FONT color="green">122</FONT>         * The separator character that is the opposite of the system separator.<a name="line.122"></a>
<FONT color="green">123</FONT>         */<a name="line.123"></a>
<FONT color="green">124</FONT>        private static final char OTHER_SEPARATOR;<a name="line.124"></a>
<FONT color="green">125</FONT>        static {<a name="line.125"></a>
<FONT color="green">126</FONT>            if (isSystemWindows()) {<a name="line.126"></a>
<FONT color="green">127</FONT>                OTHER_SEPARATOR = UNIX_SEPARATOR;<a name="line.127"></a>
<FONT color="green">128</FONT>            } else {<a name="line.128"></a>
<FONT color="green">129</FONT>                OTHER_SEPARATOR = WINDOWS_SEPARATOR;<a name="line.129"></a>
<FONT color="green">130</FONT>            }<a name="line.130"></a>
<FONT color="green">131</FONT>        }<a name="line.131"></a>
<FONT color="green">132</FONT>    <a name="line.132"></a>
<FONT color="green">133</FONT>        /**<a name="line.133"></a>
<FONT color="green">134</FONT>         * Instances should NOT be constructed in standard programming.<a name="line.134"></a>
<FONT color="green">135</FONT>         */<a name="line.135"></a>
<FONT color="green">136</FONT>        public FilenameUtils() {<a name="line.136"></a>
<FONT color="green">137</FONT>            super();<a name="line.137"></a>
<FONT color="green">138</FONT>        }<a name="line.138"></a>
<FONT color="green">139</FONT>    <a name="line.139"></a>
<FONT color="green">140</FONT>        //-----------------------------------------------------------------------<a name="line.140"></a>
<FONT color="green">141</FONT>        /**<a name="line.141"></a>
<FONT color="green">142</FONT>         * Determines if Windows file system is in use.<a name="line.142"></a>
<FONT color="green">143</FONT>         * <a name="line.143"></a>
<FONT color="green">144</FONT>         * @return true if the system is Windows<a name="line.144"></a>
<FONT color="green">145</FONT>         */<a name="line.145"></a>
<FONT color="green">146</FONT>        static boolean isSystemWindows() {<a name="line.146"></a>
<FONT color="green">147</FONT>            return SYSTEM_SEPARATOR == WINDOWS_SEPARATOR;<a name="line.147"></a>
<FONT color="green">148</FONT>        }<a name="line.148"></a>
<FONT color="green">149</FONT>    <a name="line.149"></a>
<FONT color="green">150</FONT>        //-----------------------------------------------------------------------<a name="line.150"></a>
<FONT color="green">151</FONT>        /**<a name="line.151"></a>
<FONT color="green">152</FONT>         * Checks if the character is a separator.<a name="line.152"></a>
<FONT color="green">153</FONT>         * <a name="line.153"></a>
<FONT color="green">154</FONT>         * @param ch  the character to check<a name="line.154"></a>
<FONT color="green">155</FONT>         * @return true if it is a separator character<a name="line.155"></a>
<FONT color="green">156</FONT>         */<a name="line.156"></a>
<FONT color="green">157</FONT>        private static boolean isSeparator(char ch) {<a name="line.157"></a>
<FONT color="green">158</FONT>            return (ch == UNIX_SEPARATOR) || (ch == WINDOWS_SEPARATOR);<a name="line.158"></a>
<FONT color="green">159</FONT>        }<a name="line.159"></a>
<FONT color="green">160</FONT>    <a name="line.160"></a>
<FONT color="green">161</FONT>        //-----------------------------------------------------------------------<a name="line.161"></a>
<FONT color="green">162</FONT>        /**<a name="line.162"></a>
<FONT color="green">163</FONT>         * Normalizes a path, removing double and single dot path steps.<a name="line.163"></a>
<FONT color="green">164</FONT>         * &lt;p&gt;<a name="line.164"></a>
<FONT color="green">165</FONT>         * This method normalizes a path to a standard format.<a name="line.165"></a>
<FONT color="green">166</FONT>         * The input may contain separators in either Unix or Windows format.<a name="line.166"></a>
<FONT color="green">167</FONT>         * The output will contain separators in the format of the system.<a name="line.167"></a>
<FONT color="green">168</FONT>         * &lt;p&gt;<a name="line.168"></a>
<FONT color="green">169</FONT>         * A trailing slash will be retained.<a name="line.169"></a>
<FONT color="green">170</FONT>         * A double slash will be merged to a single slash (but UNC names are handled).<a name="line.170"></a>
<FONT color="green">171</FONT>         * A single dot path segment will be removed.<a name="line.171"></a>
<FONT color="green">172</FONT>         * A double dot will cause that path segment and the one before to be removed.<a name="line.172"></a>
<FONT color="green">173</FONT>         * If the double dot has no parent path segment to work with, &lt;code&gt;null&lt;/code&gt;<a name="line.173"></a>
<FONT color="green">174</FONT>         * is returned.<a name="line.174"></a>
<FONT color="green">175</FONT>         * &lt;p&gt;<a name="line.175"></a>
<FONT color="green">176</FONT>         * The output will be the same on both Unix and Windows except<a name="line.176"></a>
<FONT color="green">177</FONT>         * for the separator character.<a name="line.177"></a>
<FONT color="green">178</FONT>         * &lt;pre&gt;<a name="line.178"></a>
<FONT color="green">179</FONT>         * /foo//               --&gt;   /foo/<a name="line.179"></a>
<FONT color="green">180</FONT>         * /foo/./              --&gt;   /foo/<a name="line.180"></a>
<FONT color="green">181</FONT>         * /foo/../bar          --&gt;   /bar<a name="line.181"></a>
<FONT color="green">182</FONT>         * /foo/../bar/         --&gt;   /bar/<a name="line.182"></a>
<FONT color="green">183</FONT>         * /foo/../bar/../baz   --&gt;   /baz<a name="line.183"></a>
<FONT color="green">184</FONT>         * //foo//./bar         --&gt;   /foo/bar<a name="line.184"></a>
<FONT color="green">185</FONT>         * /../                 --&gt;   null<a name="line.185"></a>
<FONT color="green">186</FONT>         * ../foo               --&gt;   null<a name="line.186"></a>
<FONT color="green">187</FONT>         * foo/bar/..           --&gt;   foo/<a name="line.187"></a>
<FONT color="green">188</FONT>         * foo/../../bar        --&gt;   null<a name="line.188"></a>
<FONT color="green">189</FONT>         * foo/../bar           --&gt;   bar<a name="line.189"></a>
<FONT color="green">190</FONT>         * //server/foo/../bar  --&gt;   //server/bar<a name="line.190"></a>
<FONT color="green">191</FONT>         * //server/../bar      --&gt;   null<a name="line.191"></a>
<FONT color="green">192</FONT>         * C:\foo\..\bar        --&gt;   C:\bar<a name="line.192"></a>
<FONT color="green">193</FONT>         * C:\..\bar            --&gt;   null<a name="line.193"></a>
<FONT color="green">194</FONT>         * ~/foo/../bar/        --&gt;   ~/bar/<a name="line.194"></a>
<FONT color="green">195</FONT>         * ~/../bar             --&gt;   null<a name="line.195"></a>
<FONT color="green">196</FONT>         * &lt;/pre&gt;<a name="line.196"></a>
<FONT color="green">197</FONT>         * (Note the file separator returned will be correct for Windows/Unix)<a name="line.197"></a>
<FONT color="green">198</FONT>         *<a name="line.198"></a>
<FONT color="green">199</FONT>         * @param filename  the filename to normalize, null returns null<a name="line.199"></a>
<FONT color="green">200</FONT>         * @return the normalized filename, or null if invalid<a name="line.200"></a>
<FONT color="green">201</FONT>         */<a name="line.201"></a>
<FONT color="green">202</FONT>        public static String normalize(String filename) {<a name="line.202"></a>
<FONT color="green">203</FONT>            return doNormalize(filename, SYSTEM_SEPARATOR, true);<a name="line.203"></a>
<FONT color="green">204</FONT>        }<a name="line.204"></a>
<FONT color="green">205</FONT>        /**<a name="line.205"></a>
<FONT color="green">206</FONT>         * Normalizes a path, removing double and single dot path steps.<a name="line.206"></a>
<FONT color="green">207</FONT>         * &lt;p&gt;<a name="line.207"></a>
<FONT color="green">208</FONT>         * This method normalizes a path to a standard format.<a name="line.208"></a>
<FONT color="green">209</FONT>         * The input may contain separators in either Unix or Windows format.<a name="line.209"></a>
<FONT color="green">210</FONT>         * The output will contain separators in the format specified.<a name="line.210"></a>
<FONT color="green">211</FONT>         * &lt;p&gt;<a name="line.211"></a>
<FONT color="green">212</FONT>         * A trailing slash will be retained.<a name="line.212"></a>
<FONT color="green">213</FONT>         * A double slash will be merged to a single slash (but UNC names are handled).<a name="line.213"></a>
<FONT color="green">214</FONT>         * A single dot path segment will be removed.<a name="line.214"></a>
<FONT color="green">215</FONT>         * A double dot will cause that path segment and the one before to be removed.<a name="line.215"></a>
<FONT color="green">216</FONT>         * If the double dot has no parent path segment to work with, &lt;code&gt;null&lt;/code&gt;<a name="line.216"></a>
<FONT color="green">217</FONT>         * is returned.<a name="line.217"></a>
<FONT color="green">218</FONT>         * &lt;p&gt;<a name="line.218"></a>
<FONT color="green">219</FONT>         * The output will be the same on both Unix and Windows except<a name="line.219"></a>
<FONT color="green">220</FONT>         * for the separator character.<a name="line.220"></a>
<FONT color="green">221</FONT>         * &lt;pre&gt;<a name="line.221"></a>
<FONT color="green">222</FONT>         * /foo//               --&gt;   /foo/<a name="line.222"></a>
<FONT color="green">223</FONT>         * /foo/./              --&gt;   /foo/<a name="line.223"></a>
<FONT color="green">224</FONT>         * /foo/../bar          --&gt;   /bar<a name="line.224"></a>
<FONT color="green">225</FONT>         * /foo/../bar/         --&gt;   /bar/<a name="line.225"></a>
<FONT color="green">226</FONT>         * /foo/../bar/../baz   --&gt;   /baz<a name="line.226"></a>
<FONT color="green">227</FONT>         * //foo//./bar         --&gt;   /foo/bar<a name="line.227"></a>
<FONT color="green">228</FONT>         * /../                 --&gt;   null<a name="line.228"></a>
<FONT color="green">229</FONT>         * ../foo               --&gt;   null<a name="line.229"></a>
<FONT color="green">230</FONT>         * foo/bar/..           --&gt;   foo/<a name="line.230"></a>
<FONT color="green">231</FONT>         * foo/../../bar        --&gt;   null<a name="line.231"></a>
<FONT color="green">232</FONT>         * foo/../bar           --&gt;   bar<a name="line.232"></a>
<FONT color="green">233</FONT>         * //server/foo/../bar  --&gt;   //server/bar<a name="line.233"></a>
<FONT color="green">234</FONT>         * //server/../bar      --&gt;   null<a name="line.234"></a>
<FONT color="green">235</FONT>         * C:\foo\..\bar        --&gt;   C:\bar<a name="line.235"></a>
<FONT color="green">236</FONT>         * C:\..\bar            --&gt;   null<a name="line.236"></a>
<FONT color="green">237</FONT>         * ~/foo/../bar/        --&gt;   ~/bar/<a name="line.237"></a>
<FONT color="green">238</FONT>         * ~/../bar             --&gt;   null<a name="line.238"></a>
<FONT color="green">239</FONT>         * &lt;/pre&gt;<a name="line.239"></a>
<FONT color="green">240</FONT>         * The output will be the same on both Unix and Windows including<a name="line.240"></a>
<FONT color="green">241</FONT>         * the separator character.<a name="line.241"></a>
<FONT color="green">242</FONT>         *<a name="line.242"></a>
<FONT color="green">243</FONT>         * @param filename  the filename to normalize, null returns null<a name="line.243"></a>
<FONT color="green">244</FONT>         * @param unixSeparator &lt;code&gt;true&lt;/code&gt; if a unix separator should<a name="line.244"></a>
<FONT color="green">245</FONT>         * be used or &lt;code&gt;false&lt;/code&gt; if a windows separator should be used.<a name="line.245"></a>
<FONT color="green">246</FONT>         * @return the normalized filename, or null if invalid<a name="line.246"></a>
<FONT color="green">247</FONT>         * @since Commons IO 2.0<a name="line.247"></a>
<FONT color="green">248</FONT>         */<a name="line.248"></a>
<FONT color="green">249</FONT>        public static String normalize(String filename, boolean unixSeparator) {<a name="line.249"></a>
<FONT color="green">250</FONT>            char separator = (unixSeparator ? UNIX_SEPARATOR : WINDOWS_SEPARATOR);<a name="line.250"></a>
<FONT color="green">251</FONT>            return doNormalize(filename, separator, true);<a name="line.251"></a>
<FONT color="green">252</FONT>        }<a name="line.252"></a>
<FONT color="green">253</FONT>    <a name="line.253"></a>
<FONT color="green">254</FONT>        //-----------------------------------------------------------------------<a name="line.254"></a>
<FONT color="green">255</FONT>        /**<a name="line.255"></a>
<FONT color="green">256</FONT>         * Normalizes a path, removing double and single dot path steps,<a name="line.256"></a>
<FONT color="green">257</FONT>         * and removing any final directory separator.<a name="line.257"></a>
<FONT color="green">258</FONT>         * &lt;p&gt;<a name="line.258"></a>
<FONT color="green">259</FONT>         * This method normalizes a path to a standard format.<a name="line.259"></a>
<FONT color="green">260</FONT>         * The input may contain separators in either Unix or Windows format.<a name="line.260"></a>
<FONT color="green">261</FONT>         * The output will contain separators in the format of the system.<a name="line.261"></a>
<FONT color="green">262</FONT>         * &lt;p&gt;<a name="line.262"></a>
<FONT color="green">263</FONT>         * A trailing slash will be removed.<a name="line.263"></a>
<FONT color="green">264</FONT>         * A double slash will be merged to a single slash (but UNC names are handled).<a name="line.264"></a>
<FONT color="green">265</FONT>         * A single dot path segment will be removed.<a name="line.265"></a>
<FONT color="green">266</FONT>         * A double dot will cause that path segment and the one before to be removed.<a name="line.266"></a>
<FONT color="green">267</FONT>         * If the double dot has no parent path segment to work with, &lt;code&gt;null&lt;/code&gt;<a name="line.267"></a>
<FONT color="green">268</FONT>         * is returned.<a name="line.268"></a>
<FONT color="green">269</FONT>         * &lt;p&gt;<a name="line.269"></a>
<FONT color="green">270</FONT>         * The output will be the same on both Unix and Windows except<a name="line.270"></a>
<FONT color="green">271</FONT>         * for the separator character.<a name="line.271"></a>
<FONT color="green">272</FONT>         * &lt;pre&gt;<a name="line.272"></a>
<FONT color="green">273</FONT>         * /foo//               --&gt;   /foo<a name="line.273"></a>
<FONT color="green">274</FONT>         * /foo/./              --&gt;   /foo<a name="line.274"></a>
<FONT color="green">275</FONT>         * /foo/../bar          --&gt;   /bar<a name="line.275"></a>
<FONT color="green">276</FONT>         * /foo/../bar/         --&gt;   /bar<a name="line.276"></a>
<FONT color="green">277</FONT>         * /foo/../bar/../baz   --&gt;   /baz<a name="line.277"></a>
<FONT color="green">278</FONT>         * //foo//./bar         --&gt;   /foo/bar<a name="line.278"></a>
<FONT color="green">279</FONT>         * /../                 --&gt;   null<a name="line.279"></a>
<FONT color="green">280</FONT>         * ../foo               --&gt;   null<a name="line.280"></a>
<FONT color="green">281</FONT>         * foo/bar/..           --&gt;   foo<a name="line.281"></a>
<FONT color="green">282</FONT>         * foo/../../bar        --&gt;   null<a name="line.282"></a>
<FONT color="green">283</FONT>         * foo/../bar           --&gt;   bar<a name="line.283"></a>
<FONT color="green">284</FONT>         * //server/foo/../bar  --&gt;   //server/bar<a name="line.284"></a>
<FONT color="green">285</FONT>         * //server/../bar      --&gt;   null<a name="line.285"></a>
<FONT color="green">286</FONT>         * C:\foo\..\bar        --&gt;   C:\bar<a name="line.286"></a>
<FONT color="green">287</FONT>         * C:\..\bar            --&gt;   null<a name="line.287"></a>
<FONT color="green">288</FONT>         * ~/foo/../bar/        --&gt;   ~/bar<a name="line.288"></a>
<FONT color="green">289</FONT>         * ~/../bar             --&gt;   null<a name="line.289"></a>
<FONT color="green">290</FONT>         * &lt;/pre&gt;<a name="line.290"></a>
<FONT color="green">291</FONT>         * (Note the file separator returned will be correct for Windows/Unix)<a name="line.291"></a>
<FONT color="green">292</FONT>         *<a name="line.292"></a>
<FONT color="green">293</FONT>         * @param filename  the filename to normalize, null returns null<a name="line.293"></a>
<FONT color="green">294</FONT>         * @return the normalized filename, or null if invalid<a name="line.294"></a>
<FONT color="green">295</FONT>         */<a name="line.295"></a>
<FONT color="green">296</FONT>        public static String normalizeNoEndSeparator(String filename) {<a name="line.296"></a>
<FONT color="green">297</FONT>            return doNormalize(filename, SYSTEM_SEPARATOR, false);<a name="line.297"></a>
<FONT color="green">298</FONT>        }<a name="line.298"></a>
<FONT color="green">299</FONT>    <a name="line.299"></a>
<FONT color="green">300</FONT>        /**<a name="line.300"></a>
<FONT color="green">301</FONT>         * Normalizes a path, removing double and single dot path steps,<a name="line.301"></a>
<FONT color="green">302</FONT>         * and removing any final directory separator.<a name="line.302"></a>
<FONT color="green">303</FONT>         * &lt;p&gt;<a name="line.303"></a>
<FONT color="green">304</FONT>         * This method normalizes a path to a standard format.<a name="line.304"></a>
<FONT color="green">305</FONT>         * The input may contain separators in either Unix or Windows format.<a name="line.305"></a>
<FONT color="green">306</FONT>         * The output will contain separators in the format specified.<a name="line.306"></a>
<FONT color="green">307</FONT>         * &lt;p&gt;<a name="line.307"></a>
<FONT color="green">308</FONT>         * A trailing slash will be removed.<a name="line.308"></a>
<FONT color="green">309</FONT>         * A double slash will be merged to a single slash (but UNC names are handled).<a name="line.309"></a>
<FONT color="green">310</FONT>         * A single dot path segment will be removed.<a name="line.310"></a>
<FONT color="green">311</FONT>         * A double dot will cause that path segment and the one before to be removed.<a name="line.311"></a>
<FONT color="green">312</FONT>         * If the double dot has no parent path segment to work with, &lt;code&gt;null&lt;/code&gt;<a name="line.312"></a>
<FONT color="green">313</FONT>         * is returned.<a name="line.313"></a>
<FONT color="green">314</FONT>         * &lt;p&gt;<a name="line.314"></a>
<FONT color="green">315</FONT>         * The output will be the same on both Unix and Windows including<a name="line.315"></a>
<FONT color="green">316</FONT>         * the separator character.<a name="line.316"></a>
<FONT color="green">317</FONT>         * &lt;pre&gt;<a name="line.317"></a>
<FONT color="green">318</FONT>         * /foo//               --&gt;   /foo<a name="line.318"></a>
<FONT color="green">319</FONT>         * /foo/./              --&gt;   /foo<a name="line.319"></a>
<FONT color="green">320</FONT>         * /foo/../bar          --&gt;   /bar<a name="line.320"></a>
<FONT color="green">321</FONT>         * /foo/../bar/         --&gt;   /bar<a name="line.321"></a>
<FONT color="green">322</FONT>         * /foo/../bar/../baz   --&gt;   /baz<a name="line.322"></a>
<FONT color="green">323</FONT>         * //foo//./bar         --&gt;   /foo/bar<a name="line.323"></a>
<FONT color="green">324</FONT>         * /../                 --&gt;   null<a name="line.324"></a>
<FONT color="green">325</FONT>         * ../foo               --&gt;   null<a name="line.325"></a>
<FONT color="green">326</FONT>         * foo/bar/..           --&gt;   foo<a name="line.326"></a>
<FONT color="green">327</FONT>         * foo/../../bar        --&gt;   null<a name="line.327"></a>
<FONT color="green">328</FONT>         * foo/../bar           --&gt;   bar<a name="line.328"></a>
<FONT color="green">329</FONT>         * //server/foo/../bar  --&gt;   //server/bar<a name="line.329"></a>
<FONT color="green">330</FONT>         * //server/../bar      --&gt;   null<a name="line.330"></a>
<FONT color="green">331</FONT>         * C:\foo\..\bar        --&gt;   C:\bar<a name="line.331"></a>
<FONT color="green">332</FONT>         * C:\..\bar            --&gt;   null<a name="line.332"></a>
<FONT color="green">333</FONT>         * ~/foo/../bar/        --&gt;   ~/bar<a name="line.333"></a>
<FONT color="green">334</FONT>         * ~/../bar             --&gt;   null<a name="line.334"></a>
<FONT color="green">335</FONT>         * &lt;/pre&gt;<a name="line.335"></a>
<FONT color="green">336</FONT>         *<a name="line.336"></a>
<FONT color="green">337</FONT>         * @param filename  the filename to normalize, null returns null<a name="line.337"></a>
<FONT color="green">338</FONT>         * @param unixSeparator &lt;code&gt;true&lt;/code&gt; if a unix separator should<a name="line.338"></a>
<FONT color="green">339</FONT>         * be used or &lt;code&gt;false&lt;/code&gt; if a windows separtor should be used.<a name="line.339"></a>
<FONT color="green">340</FONT>         * @return the normalized filename, or null if invalid<a name="line.340"></a>
<FONT color="green">341</FONT>         * @since Commons IO 2.0<a name="line.341"></a>
<FONT color="green">342</FONT>         */<a name="line.342"></a>
<FONT color="green">343</FONT>        public static String normalizeNoEndSeparator(String filename, boolean unixSeparator) {<a name="line.343"></a>
<FONT color="green">344</FONT>             char separator = (unixSeparator ? UNIX_SEPARATOR : WINDOWS_SEPARATOR);<a name="line.344"></a>
<FONT color="green">345</FONT>            return doNormalize(filename, separator, false);<a name="line.345"></a>
<FONT color="green">346</FONT>        }<a name="line.346"></a>
<FONT color="green">347</FONT>    <a name="line.347"></a>
<FONT color="green">348</FONT>        /**<a name="line.348"></a>
<FONT color="green">349</FONT>         * Internal method to perform the normalization.<a name="line.349"></a>
<FONT color="green">350</FONT>         *<a name="line.350"></a>
<FONT color="green">351</FONT>         * @param filename  the filename<a name="line.351"></a>
<FONT color="green">352</FONT>         * @param separator The separator character to use<a name="line.352"></a>
<FONT color="green">353</FONT>         * @param keepSeparator  true to keep the final separator<a name="line.353"></a>
<FONT color="green">354</FONT>         * @return the normalized filename<a name="line.354"></a>
<FONT color="green">355</FONT>         */<a name="line.355"></a>
<FONT color="green">356</FONT>        private static String doNormalize(String filename, char separator, boolean keepSeparator) {<a name="line.356"></a>
<FONT color="green">357</FONT>            if (filename == null) {<a name="line.357"></a>
<FONT color="green">358</FONT>                return null;<a name="line.358"></a>
<FONT color="green">359</FONT>            }<a name="line.359"></a>
<FONT color="green">360</FONT>            int size = filename.length();<a name="line.360"></a>
<FONT color="green">361</FONT>            if (size == 0) {<a name="line.361"></a>
<FONT color="green">362</FONT>                return filename;<a name="line.362"></a>
<FONT color="green">363</FONT>            }<a name="line.363"></a>
<FONT color="green">364</FONT>            int prefix = getPrefixLength(filename);<a name="line.364"></a>
<FONT color="green">365</FONT>            if (prefix &lt; 0) {<a name="line.365"></a>
<FONT color="green">366</FONT>                return null;<a name="line.366"></a>
<FONT color="green">367</FONT>            }<a name="line.367"></a>
<FONT color="green">368</FONT>            <a name="line.368"></a>
<FONT color="green">369</FONT>            char[] array = new char[size + 2];  // +1 for possible extra slash, +2 for arraycopy<a name="line.369"></a>
<FONT color="green">370</FONT>            filename.getChars(0, filename.length(), array, 0);<a name="line.370"></a>
<FONT color="green">371</FONT>            <a name="line.371"></a>
<FONT color="green">372</FONT>            // fix separators throughout<a name="line.372"></a>
<FONT color="green">373</FONT>            char otherSeparator = (separator == SYSTEM_SEPARATOR ? OTHER_SEPARATOR : SYSTEM_SEPARATOR);<a name="line.373"></a>
<FONT color="green">374</FONT>            for (int i = 0; i &lt; array.length; i++) {<a name="line.374"></a>
<FONT color="green">375</FONT>                if (array[i] == otherSeparator) {<a name="line.375"></a>
<FONT color="green">376</FONT>                    array[i] = separator;<a name="line.376"></a>
<FONT color="green">377</FONT>                }<a name="line.377"></a>
<FONT color="green">378</FONT>            }<a name="line.378"></a>
<FONT color="green">379</FONT>            <a name="line.379"></a>
<FONT color="green">380</FONT>            // add extra separator on the end to simplify code below<a name="line.380"></a>
<FONT color="green">381</FONT>            boolean lastIsDirectory = true;<a name="line.381"></a>
<FONT color="green">382</FONT>            if (array[size - 1] != separator) {<a name="line.382"></a>
<FONT color="green">383</FONT>                array[size++] = separator;<a name="line.383"></a>
<FONT color="green">384</FONT>                lastIsDirectory = false;<a name="line.384"></a>
<FONT color="green">385</FONT>            }<a name="line.385"></a>
<FONT color="green">386</FONT>            <a name="line.386"></a>
<FONT color="green">387</FONT>            // adjoining slashes<a name="line.387"></a>
<FONT color="green">388</FONT>            for (int i = prefix + 1; i &lt; size; i++) {<a name="line.388"></a>
<FONT color="green">389</FONT>                if (array[i] == separator &amp;&amp; array[i - 1] == separator) {<a name="line.389"></a>
<FONT color="green">390</FONT>                    System.arraycopy(array, i, array, i - 1, size - i);<a name="line.390"></a>
<FONT color="green">391</FONT>                    size--;<a name="line.391"></a>
<FONT color="green">392</FONT>                    i--;<a name="line.392"></a>
<FONT color="green">393</FONT>                }<a name="line.393"></a>
<FONT color="green">394</FONT>            }<a name="line.394"></a>
<FONT color="green">395</FONT>            <a name="line.395"></a>
<FONT color="green">396</FONT>            // dot slash<a name="line.396"></a>
<FONT color="green">397</FONT>            for (int i = prefix + 1; i &lt; size; i++) {<a name="line.397"></a>
<FONT color="green">398</FONT>                if (array[i] == separator &amp;&amp; array[i - 1] == '.' &amp;&amp;<a name="line.398"></a>
<FONT color="green">399</FONT>                        (i == prefix + 1 || array[i - 2] == separator)) {<a name="line.399"></a>
<FONT color="green">400</FONT>                    if (i == size - 1) {<a name="line.400"></a>
<FONT color="green">401</FONT>                        lastIsDirectory = true;<a name="line.401"></a>
<FONT color="green">402</FONT>                    }<a name="line.402"></a>
<FONT color="green">403</FONT>                    System.arraycopy(array, i + 1, array, i - 1, size - i);<a name="line.403"></a>
<FONT color="green">404</FONT>                    size -=2;<a name="line.404"></a>
<FONT color="green">405</FONT>                    i--;<a name="line.405"></a>
<FONT color="green">406</FONT>                }<a name="line.406"></a>
<FONT color="green">407</FONT>            }<a name="line.407"></a>
<FONT color="green">408</FONT>            <a name="line.408"></a>
<FONT color="green">409</FONT>            // double dot slash<a name="line.409"></a>
<FONT color="green">410</FONT>            outer:<a name="line.410"></a>
<FONT color="green">411</FONT>            for (int i = prefix + 2; i &lt; size; i++) {<a name="line.411"></a>
<FONT color="green">412</FONT>                if (array[i] == separator &amp;&amp; array[i - 1] == '.' &amp;&amp; array[i - 2] == '.' &amp;&amp;<a name="line.412"></a>
<FONT color="green">413</FONT>                        (i == prefix + 2 || array[i - 3] == separator)) {<a name="line.413"></a>
<FONT color="green">414</FONT>                    if (i == prefix + 2) {<a name="line.414"></a>
<FONT color="green">415</FONT>                        return null;<a name="line.415"></a>
<FONT color="green">416</FONT>                    }<a name="line.416"></a>
<FONT color="green">417</FONT>                    if (i == size - 1) {<a name="line.417"></a>
<FONT color="green">418</FONT>                        lastIsDirectory = true;<a name="line.418"></a>
<FONT color="green">419</FONT>                    }<a name="line.419"></a>
<FONT color="green">420</FONT>                    int j;<a name="line.420"></a>
<FONT color="green">421</FONT>                    for (j = i - 4 ; j &gt;= prefix; j--) {<a name="line.421"></a>
<FONT color="green">422</FONT>                        if (array[j] == separator) {<a name="line.422"></a>
<FONT color="green">423</FONT>                            // remove b/../ from a/b/../c<a name="line.423"></a>
<FONT color="green">424</FONT>                            System.arraycopy(array, i + 1, array, j + 1, size - i);<a name="line.424"></a>
<FONT color="green">425</FONT>                            size -= (i - j);<a name="line.425"></a>
<FONT color="green">426</FONT>                            i = j + 1;<a name="line.426"></a>
<FONT color="green">427</FONT>                            continue outer;<a name="line.427"></a>
<FONT color="green">428</FONT>                        }<a name="line.428"></a>
<FONT color="green">429</FONT>                    }<a name="line.429"></a>
<FONT color="green">430</FONT>                    // remove a/../ from a/../c<a name="line.430"></a>
<FONT color="green">431</FONT>                    System.arraycopy(array, i + 1, array, prefix, size - i);<a name="line.431"></a>
<FONT color="green">432</FONT>                    size -= (i + 1 - prefix);<a name="line.432"></a>
<FONT color="green">433</FONT>                    i = prefix + 1;<a name="line.433"></a>
<FONT color="green">434</FONT>                }<a name="line.434"></a>
<FONT color="green">435</FONT>            }<a name="line.435"></a>
<FONT color="green">436</FONT>            <a name="line.436"></a>
<FONT color="green">437</FONT>            if (size &lt;= 0) {  // should never be less than 0<a name="line.437"></a>
<FONT color="green">438</FONT>                return "";<a name="line.438"></a>
<FONT color="green">439</FONT>            }<a name="line.439"></a>
<FONT color="green">440</FONT>            if (size &lt;= prefix) {  // should never be less than prefix<a name="line.440"></a>
<FONT color="green">441</FONT>                return new String(array, 0, size);<a name="line.441"></a>
<FONT color="green">442</FONT>            }<a name="line.442"></a>
<FONT color="green">443</FONT>            if (lastIsDirectory &amp;&amp; keepSeparator) {<a name="line.443"></a>
<FONT color="green">444</FONT>                return new String(array, 0, size);  // keep trailing separator<a name="line.444"></a>
<FONT color="green">445</FONT>            }<a name="line.445"></a>
<FONT color="green">446</FONT>            return new String(array, 0, size - 1);  // lose trailing separator<a name="line.446"></a>
<FONT color="green">447</FONT>        }<a name="line.447"></a>
<FONT color="green">448</FONT>    <a name="line.448"></a>
<FONT color="green">449</FONT>        //-----------------------------------------------------------------------<a name="line.449"></a>
<FONT color="green">450</FONT>        /**<a name="line.450"></a>
<FONT color="green">451</FONT>         * Concatenates a filename to a base path using normal command line style rules.<a name="line.451"></a>
<FONT color="green">452</FONT>         * &lt;p&gt;<a name="line.452"></a>
<FONT color="green">453</FONT>         * The effect is equivalent to resultant directory after changing<a name="line.453"></a>
<FONT color="green">454</FONT>         * directory to the first argument, followed by changing directory to<a name="line.454"></a>
<FONT color="green">455</FONT>         * the second argument.<a name="line.455"></a>
<FONT color="green">456</FONT>         * &lt;p&gt;<a name="line.456"></a>
<FONT color="green">457</FONT>         * The first argument is the base path, the second is the path to concatenate.<a name="line.457"></a>
<FONT color="green">458</FONT>         * The returned path is always normalized via {@link #normalize(String)},<a name="line.458"></a>
<FONT color="green">459</FONT>         * thus &lt;code&gt;..&lt;/code&gt; is handled.<a name="line.459"></a>
<FONT color="green">460</FONT>         * &lt;p&gt;<a name="line.460"></a>
<FONT color="green">461</FONT>         * If &lt;code&gt;pathToAdd&lt;/code&gt; is absolute (has an absolute prefix), then<a name="line.461"></a>
<FONT color="green">462</FONT>         * it will be normalized and returned.<a name="line.462"></a>
<FONT color="green">463</FONT>         * Otherwise, the paths will be joined, normalized and returned.<a name="line.463"></a>
<FONT color="green">464</FONT>         * &lt;p&gt;<a name="line.464"></a>
<FONT color="green">465</FONT>         * The output will be the same on both Unix and Windows except<a name="line.465"></a>
<FONT color="green">466</FONT>         * for the separator character.<a name="line.466"></a>
<FONT color="green">467</FONT>         * &lt;pre&gt;<a name="line.467"></a>
<FONT color="green">468</FONT>         * /foo/ + bar          --&gt;   /foo/bar<a name="line.468"></a>
<FONT color="green">469</FONT>         * /foo + bar           --&gt;   /foo/bar<a name="line.469"></a>
<FONT color="green">470</FONT>         * /foo + /bar          --&gt;   /bar<a name="line.470"></a>
<FONT color="green">471</FONT>         * /foo + C:/bar        --&gt;   C:/bar<a name="line.471"></a>
<FONT color="green">472</FONT>         * /foo + C:bar         --&gt;   C:bar (*)<a name="line.472"></a>
<FONT color="green">473</FONT>         * /foo/a/ + ../bar     --&gt;   foo/bar<a name="line.473"></a>
<FONT color="green">474</FONT>         * /foo/ + ../../bar    --&gt;   null<a name="line.474"></a>
<FONT color="green">475</FONT>         * /foo/ + /bar         --&gt;   /bar<a name="line.475"></a>
<FONT color="green">476</FONT>         * /foo/.. + /bar       --&gt;   /bar<a name="line.476"></a>
<FONT color="green">477</FONT>         * /foo + bar/c.txt     --&gt;   /foo/bar/c.txt<a name="line.477"></a>
<FONT color="green">478</FONT>         * /foo/c.txt + bar     --&gt;   /foo/c.txt/bar (!)<a name="line.478"></a>
<FONT color="green">479</FONT>         * &lt;/pre&gt;<a name="line.479"></a>
<FONT color="green">480</FONT>         * (*) Note that the Windows relative drive prefix is unreliable when<a name="line.480"></a>
<FONT color="green">481</FONT>         * used with this method.<a name="line.481"></a>
<FONT color="green">482</FONT>         * (!) Note that the first parameter must be a path. If it ends with a name, then<a name="line.482"></a>
<FONT color="green">483</FONT>         * the name will be built into the concatenated path. If this might be a problem,<a name="line.483"></a>
<FONT color="green">484</FONT>         * use {@link #getFullPath(String)} on the base path argument.<a name="line.484"></a>
<FONT color="green">485</FONT>         *<a name="line.485"></a>
<FONT color="green">486</FONT>         * @param basePath  the base path to attach to, always treated as a path<a name="line.486"></a>
<FONT color="green">487</FONT>         * @param fullFilenameToAdd  the filename (or path) to attach to the base<a name="line.487"></a>
<FONT color="green">488</FONT>         * @return the concatenated path, or null if invalid<a name="line.488"></a>
<FONT color="green">489</FONT>         */<a name="line.489"></a>
<FONT color="green">490</FONT>        public static String concat(String basePath, String fullFilenameToAdd) {<a name="line.490"></a>
<FONT color="green">491</FONT>            int prefix = getPrefixLength(fullFilenameToAdd);<a name="line.491"></a>
<FONT color="green">492</FONT>            if (prefix &lt; 0) {<a name="line.492"></a>
<FONT color="green">493</FONT>                return null;<a name="line.493"></a>
<FONT color="green">494</FONT>            }<a name="line.494"></a>
<FONT color="green">495</FONT>            if (prefix &gt; 0) {<a name="line.495"></a>
<FONT color="green">496</FONT>                return normalize(fullFilenameToAdd);<a name="line.496"></a>
<FONT color="green">497</FONT>            }<a name="line.497"></a>
<FONT color="green">498</FONT>            if (basePath == null) {<a name="line.498"></a>
<FONT color="green">499</FONT>                return null;<a name="line.499"></a>
<FONT color="green">500</FONT>            }<a name="line.500"></a>
<FONT color="green">501</FONT>            int len = basePath.length();<a name="line.501"></a>
<FONT color="green">502</FONT>            if (len == 0) {<a name="line.502"></a>
<FONT color="green">503</FONT>                return normalize(fullFilenameToAdd);<a name="line.503"></a>
<FONT color="green">504</FONT>            }<a name="line.504"></a>
<FONT color="green">505</FONT>            char ch = basePath.charAt(len - 1);<a name="line.505"></a>
<FONT color="green">506</FONT>            if (isSeparator(ch)) {<a name="line.506"></a>
<FONT color="green">507</FONT>                return normalize(basePath + fullFilenameToAdd);<a name="line.507"></a>
<FONT color="green">508</FONT>            } else {<a name="line.508"></a>
<FONT color="green">509</FONT>                return normalize(basePath + '/' + fullFilenameToAdd);<a name="line.509"></a>
<FONT color="green">510</FONT>            }<a name="line.510"></a>
<FONT color="green">511</FONT>        }<a name="line.511"></a>
<FONT color="green">512</FONT>    <a name="line.512"></a>
<FONT color="green">513</FONT>        //-----------------------------------------------------------------------<a name="line.513"></a>
<FONT color="green">514</FONT>        /**<a name="line.514"></a>
<FONT color="green">515</FONT>         * Converts all separators to the Unix separator of forward slash.<a name="line.515"></a>
<FONT color="green">516</FONT>         * <a name="line.516"></a>
<FONT color="green">517</FONT>         * @param path  the path to be changed, null ignored<a name="line.517"></a>
<FONT color="green">518</FONT>         * @return the updated path<a name="line.518"></a>
<FONT color="green">519</FONT>         */<a name="line.519"></a>
<FONT color="green">520</FONT>        public static String separatorsToUnix(String path) {<a name="line.520"></a>
<FONT color="green">521</FONT>            if (path == null || path.indexOf(WINDOWS_SEPARATOR) == -1) {<a name="line.521"></a>
<FONT color="green">522</FONT>                return path;<a name="line.522"></a>
<FONT color="green">523</FONT>            }<a name="line.523"></a>
<FONT color="green">524</FONT>            return path.replace(WINDOWS_SEPARATOR, UNIX_SEPARATOR);<a name="line.524"></a>
<FONT color="green">525</FONT>        }<a name="line.525"></a>
<FONT color="green">526</FONT>    <a name="line.526"></a>
<FONT color="green">527</FONT>        /**<a name="line.527"></a>
<FONT color="green">528</FONT>         * Converts all separators to the Windows separator of backslash.<a name="line.528"></a>
<FONT color="green">529</FONT>         * <a name="line.529"></a>
<FONT color="green">530</FONT>         * @param path  the path to be changed, null ignored<a name="line.530"></a>
<FONT color="green">531</FONT>         * @return the updated path<a name="line.531"></a>
<FONT color="green">532</FONT>         */<a name="line.532"></a>
<FONT color="green">533</FONT>        public static String separatorsToWindows(String path) {<a name="line.533"></a>
<FONT color="green">534</FONT>            if (path == null || path.indexOf(UNIX_SEPARATOR) == -1) {<a name="line.534"></a>
<FONT color="green">535</FONT>                return path;<a name="line.535"></a>
<FONT color="green">536</FONT>            }<a name="line.536"></a>
<FONT color="green">537</FONT>            return path.replace(UNIX_SEPARATOR, WINDOWS_SEPARATOR);<a name="line.537"></a>
<FONT color="green">538</FONT>        }<a name="line.538"></a>
<FONT color="green">539</FONT>    <a name="line.539"></a>
<FONT color="green">540</FONT>        /**<a name="line.540"></a>
<FONT color="green">541</FONT>         * Converts all separators to the system separator.<a name="line.541"></a>
<FONT color="green">542</FONT>         * <a name="line.542"></a>
<FONT color="green">543</FONT>         * @param path  the path to be changed, null ignored<a name="line.543"></a>
<FONT color="green">544</FONT>         * @return the updated path<a name="line.544"></a>
<FONT color="green">545</FONT>         */<a name="line.545"></a>
<FONT color="green">546</FONT>        public static String separatorsToSystem(String path) {<a name="line.546"></a>
<FONT color="green">547</FONT>            if (path == null) {<a name="line.547"></a>
<FONT color="green">548</FONT>                return null;<a name="line.548"></a>
<FONT color="green">549</FONT>            }<a name="line.549"></a>
<FONT color="green">550</FONT>            if (isSystemWindows()) {<a name="line.550"></a>
<FONT color="green">551</FONT>                return separatorsToWindows(path);<a name="line.551"></a>
<FONT color="green">552</FONT>            } else {<a name="line.552"></a>
<FONT color="green">553</FONT>                return separatorsToUnix(path);<a name="line.553"></a>
<FONT color="green">554</FONT>            }<a name="line.554"></a>
<FONT color="green">555</FONT>        }<a name="line.555"></a>
<FONT color="green">556</FONT>    <a name="line.556"></a>
<FONT color="green">557</FONT>        //-----------------------------------------------------------------------<a name="line.557"></a>
<FONT color="green">558</FONT>        /**<a name="line.558"></a>
<FONT color="green">559</FONT>         * Returns the length of the filename prefix, such as &lt;code&gt;C:/&lt;/code&gt; or &lt;code&gt;~/&lt;/code&gt;.<a name="line.559"></a>
<FONT color="green">560</FONT>         * &lt;p&gt;<a name="line.560"></a>
<FONT color="green">561</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.561"></a>
<FONT color="green">562</FONT>         * &lt;p&gt;<a name="line.562"></a>
<FONT color="green">563</FONT>         * The prefix length includes the first slash in the full filename<a name="line.563"></a>
<FONT color="green">564</FONT>         * if applicable. Thus, it is possible that the length returned is greater<a name="line.564"></a>
<FONT color="green">565</FONT>         * than the length of the input string.<a name="line.565"></a>
<FONT color="green">566</FONT>         * &lt;pre&gt;<a name="line.566"></a>
<FONT color="green">567</FONT>         * Windows:<a name="line.567"></a>
<FONT color="green">568</FONT>         * a\b\c.txt           --&gt; ""          --&gt; relative<a name="line.568"></a>
<FONT color="green">569</FONT>         * \a\b\c.txt          --&gt; "\"         --&gt; current drive absolute<a name="line.569"></a>
<FONT color="green">570</FONT>         * C:a\b\c.txt         --&gt; "C:"        --&gt; drive relative<a name="line.570"></a>
<FONT color="green">571</FONT>         * C:\a\b\c.txt        --&gt; "C:\"       --&gt; absolute<a name="line.571"></a>
<FONT color="green">572</FONT>         * \\server\a\b\c.txt  --&gt; "\\server\" --&gt; UNC<a name="line.572"></a>
<FONT color="green">573</FONT>         *<a name="line.573"></a>
<FONT color="green">574</FONT>         * Unix:<a name="line.574"></a>
<FONT color="green">575</FONT>         * a/b/c.txt           --&gt; ""          --&gt; relative<a name="line.575"></a>
<FONT color="green">576</FONT>         * /a/b/c.txt          --&gt; "/"         --&gt; absolute<a name="line.576"></a>
<FONT color="green">577</FONT>         * ~/a/b/c.txt         --&gt; "~/"        --&gt; current user<a name="line.577"></a>
<FONT color="green">578</FONT>         * ~                   --&gt; "~/"        --&gt; current user (slash added)<a name="line.578"></a>
<FONT color="green">579</FONT>         * ~user/a/b/c.txt     --&gt; "~user/"    --&gt; named user<a name="line.579"></a>
<FONT color="green">580</FONT>         * ~user               --&gt; "~user/"    --&gt; named user (slash added)<a name="line.580"></a>
<FONT color="green">581</FONT>         * &lt;/pre&gt;<a name="line.581"></a>
<FONT color="green">582</FONT>         * &lt;p&gt;<a name="line.582"></a>
<FONT color="green">583</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.583"></a>
<FONT color="green">584</FONT>         * ie. both Unix and Windows prefixes are matched regardless.<a name="line.584"></a>
<FONT color="green">585</FONT>         *<a name="line.585"></a>
<FONT color="green">586</FONT>         * @param filename  the filename to find the prefix in, null returns -1<a name="line.586"></a>
<FONT color="green">587</FONT>         * @return the length of the prefix, -1 if invalid or null<a name="line.587"></a>
<FONT color="green">588</FONT>         */<a name="line.588"></a>
<FONT color="green">589</FONT>        public static int getPrefixLength(String filename) {<a name="line.589"></a>
<FONT color="green">590</FONT>            if (filename == null) {<a name="line.590"></a>
<FONT color="green">591</FONT>                return -1;<a name="line.591"></a>
<FONT color="green">592</FONT>            }<a name="line.592"></a>
<FONT color="green">593</FONT>            int len = filename.length();<a name="line.593"></a>
<FONT color="green">594</FONT>            if (len == 0) {<a name="line.594"></a>
<FONT color="green">595</FONT>                return 0;<a name="line.595"></a>
<FONT color="green">596</FONT>            }<a name="line.596"></a>
<FONT color="green">597</FONT>            char ch0 = filename.charAt(0);<a name="line.597"></a>
<FONT color="green">598</FONT>            if (ch0 == ':') {<a name="line.598"></a>
<FONT color="green">599</FONT>                return -1;<a name="line.599"></a>
<FONT color="green">600</FONT>            }<a name="line.600"></a>
<FONT color="green">601</FONT>            if (len == 1) {<a name="line.601"></a>
<FONT color="green">602</FONT>                if (ch0 == '~') {<a name="line.602"></a>
<FONT color="green">603</FONT>                    return 2;  // return a length greater than the input<a name="line.603"></a>
<FONT color="green">604</FONT>                }<a name="line.604"></a>
<FONT color="green">605</FONT>                return (isSeparator(ch0) ? 1 : 0);<a name="line.605"></a>
<FONT color="green">606</FONT>            } else {<a name="line.606"></a>
<FONT color="green">607</FONT>                if (ch0 == '~') {<a name="line.607"></a>
<FONT color="green">608</FONT>                    int posUnix = filename.indexOf(UNIX_SEPARATOR, 1);<a name="line.608"></a>
<FONT color="green">609</FONT>                    int posWin = filename.indexOf(WINDOWS_SEPARATOR, 1);<a name="line.609"></a>
<FONT color="green">610</FONT>                    if (posUnix == -1 &amp;&amp; posWin == -1) {<a name="line.610"></a>
<FONT color="green">611</FONT>                        return len + 1;  // return a length greater than the input<a name="line.611"></a>
<FONT color="green">612</FONT>                    }<a name="line.612"></a>
<FONT color="green">613</FONT>                    posUnix = (posUnix == -1 ? posWin : posUnix);<a name="line.613"></a>
<FONT color="green">614</FONT>                    posWin = (posWin == -1 ? posUnix : posWin);<a name="line.614"></a>
<FONT color="green">615</FONT>                    return Math.min(posUnix, posWin) + 1;<a name="line.615"></a>
<FONT color="green">616</FONT>                }<a name="line.616"></a>
<FONT color="green">617</FONT>                char ch1 = filename.charAt(1);<a name="line.617"></a>
<FONT color="green">618</FONT>                if (ch1 == ':') {<a name="line.618"></a>
<FONT color="green">619</FONT>                    ch0 = Character.toUpperCase(ch0);<a name="line.619"></a>
<FONT color="green">620</FONT>                    if (ch0 &gt;= 'A' &amp;&amp; ch0 &lt;= 'Z') {<a name="line.620"></a>
<FONT color="green">621</FONT>                        if (len == 2 || isSeparator(filename.charAt(2)) == false) {<a name="line.621"></a>
<FONT color="green">622</FONT>                            return 2;<a name="line.622"></a>
<FONT color="green">623</FONT>                        }<a name="line.623"></a>
<FONT color="green">624</FONT>                        return 3;<a name="line.624"></a>
<FONT color="green">625</FONT>                    }<a name="line.625"></a>
<FONT color="green">626</FONT>                    return -1;<a name="line.626"></a>
<FONT color="green">627</FONT>                    <a name="line.627"></a>
<FONT color="green">628</FONT>                } else if (isSeparator(ch0) &amp;&amp; isSeparator(ch1)) {<a name="line.628"></a>
<FONT color="green">629</FONT>                    int posUnix = filename.indexOf(UNIX_SEPARATOR, 2);<a name="line.629"></a>
<FONT color="green">630</FONT>                    int posWin = filename.indexOf(WINDOWS_SEPARATOR, 2);<a name="line.630"></a>
<FONT color="green">631</FONT>                    if ((posUnix == -1 &amp;&amp; posWin == -1) || posUnix == 2 || posWin == 2) {<a name="line.631"></a>
<FONT color="green">632</FONT>                        return -1;<a name="line.632"></a>
<FONT color="green">633</FONT>                    }<a name="line.633"></a>
<FONT color="green">634</FONT>                    posUnix = (posUnix == -1 ? posWin : posUnix);<a name="line.634"></a>
<FONT color="green">635</FONT>                    posWin = (posWin == -1 ? posUnix : posWin);<a name="line.635"></a>
<FONT color="green">636</FONT>                    return Math.min(posUnix, posWin) + 1;<a name="line.636"></a>
<FONT color="green">637</FONT>                } else {<a name="line.637"></a>
<FONT color="green">638</FONT>                    return (isSeparator(ch0) ? 1 : 0);<a name="line.638"></a>
<FONT color="green">639</FONT>                }<a name="line.639"></a>
<FONT color="green">640</FONT>            }<a name="line.640"></a>
<FONT color="green">641</FONT>        }<a name="line.641"></a>
<FONT color="green">642</FONT>    <a name="line.642"></a>
<FONT color="green">643</FONT>        /**<a name="line.643"></a>
<FONT color="green">644</FONT>         * Returns the index of the last directory separator character.<a name="line.644"></a>
<FONT color="green">645</FONT>         * &lt;p&gt;<a name="line.645"></a>
<FONT color="green">646</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.646"></a>
<FONT color="green">647</FONT>         * The position of the last forward or backslash is returned.<a name="line.647"></a>
<FONT color="green">648</FONT>         * &lt;p&gt;<a name="line.648"></a>
<FONT color="green">649</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.649"></a>
<FONT color="green">650</FONT>         * <a name="line.650"></a>
<FONT color="green">651</FONT>         * @param filename  the filename to find the last path separator in, null returns -1<a name="line.651"></a>
<FONT color="green">652</FONT>         * @return the index of the last separator character, or -1 if there<a name="line.652"></a>
<FONT color="green">653</FONT>         * is no such character<a name="line.653"></a>
<FONT color="green">654</FONT>         */<a name="line.654"></a>
<FONT color="green">655</FONT>        public static int indexOfLastSeparator(String filename) {<a name="line.655"></a>
<FONT color="green">656</FONT>            if (filename == null) {<a name="line.656"></a>
<FONT color="green">657</FONT>                return -1;<a name="line.657"></a>
<FONT color="green">658</FONT>            }<a name="line.658"></a>
<FONT color="green">659</FONT>            int lastUnixPos = filename.lastIndexOf(UNIX_SEPARATOR);<a name="line.659"></a>
<FONT color="green">660</FONT>            int lastWindowsPos = filename.lastIndexOf(WINDOWS_SEPARATOR);<a name="line.660"></a>
<FONT color="green">661</FONT>            return Math.max(lastUnixPos, lastWindowsPos);<a name="line.661"></a>
<FONT color="green">662</FONT>        }<a name="line.662"></a>
<FONT color="green">663</FONT>    <a name="line.663"></a>
<FONT color="green">664</FONT>        /**<a name="line.664"></a>
<FONT color="green">665</FONT>         * Returns the index of the last extension separator character, which is a dot.<a name="line.665"></a>
<FONT color="green">666</FONT>         * &lt;p&gt;<a name="line.666"></a>
<FONT color="green">667</FONT>         * This method also checks that there is no directory separator after the last dot.<a name="line.667"></a>
<FONT color="green">668</FONT>         * To do this it uses {@link #indexOfLastSeparator(String)} which will<a name="line.668"></a>
<FONT color="green">669</FONT>         * handle a file in either Unix or Windows format.<a name="line.669"></a>
<FONT color="green">670</FONT>         * &lt;p&gt;<a name="line.670"></a>
<FONT color="green">671</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.671"></a>
<FONT color="green">672</FONT>         * <a name="line.672"></a>
<FONT color="green">673</FONT>         * @param filename  the filename to find the last path separator in, null returns -1<a name="line.673"></a>
<FONT color="green">674</FONT>         * @return the index of the last separator character, or -1 if there<a name="line.674"></a>
<FONT color="green">675</FONT>         * is no such character<a name="line.675"></a>
<FONT color="green">676</FONT>         */<a name="line.676"></a>
<FONT color="green">677</FONT>        public static int indexOfExtension(String filename) {<a name="line.677"></a>
<FONT color="green">678</FONT>            if (filename == null) {<a name="line.678"></a>
<FONT color="green">679</FONT>                return -1;<a name="line.679"></a>
<FONT color="green">680</FONT>            }<a name="line.680"></a>
<FONT color="green">681</FONT>            int extensionPos = filename.lastIndexOf(EXTENSION_SEPARATOR);<a name="line.681"></a>
<FONT color="green">682</FONT>            int lastSeparator = indexOfLastSeparator(filename);<a name="line.682"></a>
<FONT color="green">683</FONT>            return (lastSeparator &gt; extensionPos ? -1 : extensionPos);<a name="line.683"></a>
<FONT color="green">684</FONT>        }<a name="line.684"></a>
<FONT color="green">685</FONT>    <a name="line.685"></a>
<FONT color="green">686</FONT>        //-----------------------------------------------------------------------<a name="line.686"></a>
<FONT color="green">687</FONT>        /**<a name="line.687"></a>
<FONT color="green">688</FONT>         * Gets the prefix from a full filename, such as &lt;code&gt;C:/&lt;/code&gt;<a name="line.688"></a>
<FONT color="green">689</FONT>         * or &lt;code&gt;~/&lt;/code&gt;.<a name="line.689"></a>
<FONT color="green">690</FONT>         * &lt;p&gt;<a name="line.690"></a>
<FONT color="green">691</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.691"></a>
<FONT color="green">692</FONT>         * The prefix includes the first slash in the full filename where applicable.<a name="line.692"></a>
<FONT color="green">693</FONT>         * &lt;pre&gt;<a name="line.693"></a>
<FONT color="green">694</FONT>         * Windows:<a name="line.694"></a>
<FONT color="green">695</FONT>         * a\b\c.txt           --&gt; ""          --&gt; relative<a name="line.695"></a>
<FONT color="green">696</FONT>         * \a\b\c.txt          --&gt; "\"         --&gt; current drive absolute<a name="line.696"></a>
<FONT color="green">697</FONT>         * C:a\b\c.txt         --&gt; "C:"        --&gt; drive relative<a name="line.697"></a>
<FONT color="green">698</FONT>         * C:\a\b\c.txt        --&gt; "C:\"       --&gt; absolute<a name="line.698"></a>
<FONT color="green">699</FONT>         * \\server\a\b\c.txt  --&gt; "\\server\" --&gt; UNC<a name="line.699"></a>
<FONT color="green">700</FONT>         *<a name="line.700"></a>
<FONT color="green">701</FONT>         * Unix:<a name="line.701"></a>
<FONT color="green">702</FONT>         * a/b/c.txt           --&gt; ""          --&gt; relative<a name="line.702"></a>
<FONT color="green">703</FONT>         * /a/b/c.txt          --&gt; "/"         --&gt; absolute<a name="line.703"></a>
<FONT color="green">704</FONT>         * ~/a/b/c.txt         --&gt; "~/"        --&gt; current user<a name="line.704"></a>
<FONT color="green">705</FONT>         * ~                   --&gt; "~/"        --&gt; current user (slash added)<a name="line.705"></a>
<FONT color="green">706</FONT>         * ~user/a/b/c.txt     --&gt; "~user/"    --&gt; named user<a name="line.706"></a>
<FONT color="green">707</FONT>         * ~user               --&gt; "~user/"    --&gt; named user (slash added)<a name="line.707"></a>
<FONT color="green">708</FONT>         * &lt;/pre&gt;<a name="line.708"></a>
<FONT color="green">709</FONT>         * &lt;p&gt;<a name="line.709"></a>
<FONT color="green">710</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.710"></a>
<FONT color="green">711</FONT>         * ie. both Unix and Windows prefixes are matched regardless.<a name="line.711"></a>
<FONT color="green">712</FONT>         *<a name="line.712"></a>
<FONT color="green">713</FONT>         * @param filename  the filename to query, null returns null<a name="line.713"></a>
<FONT color="green">714</FONT>         * @return the prefix of the file, null if invalid<a name="line.714"></a>
<FONT color="green">715</FONT>         */<a name="line.715"></a>
<FONT color="green">716</FONT>        public static String getPrefix(String filename) {<a name="line.716"></a>
<FONT color="green">717</FONT>            if (filename == null) {<a name="line.717"></a>
<FONT color="green">718</FONT>                return null;<a name="line.718"></a>
<FONT color="green">719</FONT>            }<a name="line.719"></a>
<FONT color="green">720</FONT>            int len = getPrefixLength(filename);<a name="line.720"></a>
<FONT color="green">721</FONT>            if (len &lt; 0) {<a name="line.721"></a>
<FONT color="green">722</FONT>                return null;<a name="line.722"></a>
<FONT color="green">723</FONT>            }<a name="line.723"></a>
<FONT color="green">724</FONT>            if (len &gt; filename.length()) {<a name="line.724"></a>
<FONT color="green">725</FONT>                return filename + UNIX_SEPARATOR;  // we know this only happens for unix<a name="line.725"></a>
<FONT color="green">726</FONT>            }<a name="line.726"></a>
<FONT color="green">727</FONT>            return filename.substring(0, len);<a name="line.727"></a>
<FONT color="green">728</FONT>        }<a name="line.728"></a>
<FONT color="green">729</FONT>    <a name="line.729"></a>
<FONT color="green">730</FONT>        /**<a name="line.730"></a>
<FONT color="green">731</FONT>         * Gets the path from a full filename, which excludes the prefix.<a name="line.731"></a>
<FONT color="green">732</FONT>         * &lt;p&gt;<a name="line.732"></a>
<FONT color="green">733</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.733"></a>
<FONT color="green">734</FONT>         * The method is entirely text based, and returns the text before and<a name="line.734"></a>
<FONT color="green">735</FONT>         * including the last forward or backslash.<a name="line.735"></a>
<FONT color="green">736</FONT>         * &lt;pre&gt;<a name="line.736"></a>
<FONT color="green">737</FONT>         * C:\a\b\c.txt --&gt; a\b\<a name="line.737"></a>
<FONT color="green">738</FONT>         * ~/a/b/c.txt  --&gt; a/b/<a name="line.738"></a>
<FONT color="green">739</FONT>         * a.txt        --&gt; ""<a name="line.739"></a>
<FONT color="green">740</FONT>         * a/b/c        --&gt; a/b/<a name="line.740"></a>
<FONT color="green">741</FONT>         * a/b/c/       --&gt; a/b/c/<a name="line.741"></a>
<FONT color="green">742</FONT>         * &lt;/pre&gt;<a name="line.742"></a>
<FONT color="green">743</FONT>         * &lt;p&gt;<a name="line.743"></a>
<FONT color="green">744</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.744"></a>
<FONT color="green">745</FONT>         * &lt;p&gt;<a name="line.745"></a>
<FONT color="green">746</FONT>         * This method drops the prefix from the result.<a name="line.746"></a>
<FONT color="green">747</FONT>         * See {@link #getFullPath(String)} for the method that retains the prefix.<a name="line.747"></a>
<FONT color="green">748</FONT>         *<a name="line.748"></a>
<FONT color="green">749</FONT>         * @param filename  the filename to query, null returns null<a name="line.749"></a>
<FONT color="green">750</FONT>         * @return the path of the file, an empty string if none exists, null if invalid<a name="line.750"></a>
<FONT color="green">751</FONT>         */<a name="line.751"></a>
<FONT color="green">752</FONT>        public static String getPath(String filename) {<a name="line.752"></a>
<FONT color="green">753</FONT>            return doGetPath(filename, 1);<a name="line.753"></a>
<FONT color="green">754</FONT>        }<a name="line.754"></a>
<FONT color="green">755</FONT>    <a name="line.755"></a>
<FONT color="green">756</FONT>        /**<a name="line.756"></a>
<FONT color="green">757</FONT>         * Gets the path from a full filename, which excludes the prefix, and<a name="line.757"></a>
<FONT color="green">758</FONT>         * also excluding the final directory separator.<a name="line.758"></a>
<FONT color="green">759</FONT>         * &lt;p&gt;<a name="line.759"></a>
<FONT color="green">760</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.760"></a>
<FONT color="green">761</FONT>         * The method is entirely text based, and returns the text before the<a name="line.761"></a>
<FONT color="green">762</FONT>         * last forward or backslash.<a name="line.762"></a>
<FONT color="green">763</FONT>         * &lt;pre&gt;<a name="line.763"></a>
<FONT color="green">764</FONT>         * C:\a\b\c.txt --&gt; a\b<a name="line.764"></a>
<FONT color="green">765</FONT>         * ~/a/b/c.txt  --&gt; a/b<a name="line.765"></a>
<FONT color="green">766</FONT>         * a.txt        --&gt; ""<a name="line.766"></a>
<FONT color="green">767</FONT>         * a/b/c        --&gt; a/b<a name="line.767"></a>
<FONT color="green">768</FONT>         * a/b/c/       --&gt; a/b/c<a name="line.768"></a>
<FONT color="green">769</FONT>         * &lt;/pre&gt;<a name="line.769"></a>
<FONT color="green">770</FONT>         * &lt;p&gt;<a name="line.770"></a>
<FONT color="green">771</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.771"></a>
<FONT color="green">772</FONT>         * &lt;p&gt;<a name="line.772"></a>
<FONT color="green">773</FONT>         * This method drops the prefix from the result.<a name="line.773"></a>
<FONT color="green">774</FONT>         * See {@link #getFullPathNoEndSeparator(String)} for the method that retains the prefix.<a name="line.774"></a>
<FONT color="green">775</FONT>         *<a name="line.775"></a>
<FONT color="green">776</FONT>         * @param filename  the filename to query, null returns null<a name="line.776"></a>
<FONT color="green">777</FONT>         * @return the path of the file, an empty string if none exists, null if invalid<a name="line.777"></a>
<FONT color="green">778</FONT>         */<a name="line.778"></a>
<FONT color="green">779</FONT>        public static String getPathNoEndSeparator(String filename) {<a name="line.779"></a>
<FONT color="green">780</FONT>            return doGetPath(filename, 0);<a name="line.780"></a>
<FONT color="green">781</FONT>        }<a name="line.781"></a>
<FONT color="green">782</FONT>    <a name="line.782"></a>
<FONT color="green">783</FONT>        /**<a name="line.783"></a>
<FONT color="green">784</FONT>         * Does the work of getting the path.<a name="line.784"></a>
<FONT color="green">785</FONT>         * <a name="line.785"></a>
<FONT color="green">786</FONT>         * @param filename  the filename<a name="line.786"></a>
<FONT color="green">787</FONT>         * @param separatorAdd  0 to omit the end separator, 1 to return it<a name="line.787"></a>
<FONT color="green">788</FONT>         * @return the path<a name="line.788"></a>
<FONT color="green">789</FONT>         */<a name="line.789"></a>
<FONT color="green">790</FONT>        private static String doGetPath(String filename, int separatorAdd) {<a name="line.790"></a>
<FONT color="green">791</FONT>            if (filename == null) {<a name="line.791"></a>
<FONT color="green">792</FONT>                return null;<a name="line.792"></a>
<FONT color="green">793</FONT>            }<a name="line.793"></a>
<FONT color="green">794</FONT>            int prefix = getPrefixLength(filename);<a name="line.794"></a>
<FONT color="green">795</FONT>            if (prefix &lt; 0) {<a name="line.795"></a>
<FONT color="green">796</FONT>                return null;<a name="line.796"></a>
<FONT color="green">797</FONT>            }<a name="line.797"></a>
<FONT color="green">798</FONT>            int index = indexOfLastSeparator(filename);<a name="line.798"></a>
<FONT color="green">799</FONT>            int endIndex = index+separatorAdd;<a name="line.799"></a>
<FONT color="green">800</FONT>            if (prefix &gt;= filename.length() || index &lt; 0 || prefix &gt;= endIndex) {<a name="line.800"></a>
<FONT color="green">801</FONT>                return "";<a name="line.801"></a>
<FONT color="green">802</FONT>            }<a name="line.802"></a>
<FONT color="green">803</FONT>            return filename.substring(prefix, endIndex);<a name="line.803"></a>
<FONT color="green">804</FONT>        }<a name="line.804"></a>
<FONT color="green">805</FONT>    <a name="line.805"></a>
<FONT color="green">806</FONT>        /**<a name="line.806"></a>
<FONT color="green">807</FONT>         * Gets the full path from a full filename, which is the prefix + path.<a name="line.807"></a>
<FONT color="green">808</FONT>         * &lt;p&gt;<a name="line.808"></a>
<FONT color="green">809</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.809"></a>
<FONT color="green">810</FONT>         * The method is entirely text based, and returns the text before and<a name="line.810"></a>
<FONT color="green">811</FONT>         * including the last forward or backslash.<a name="line.811"></a>
<FONT color="green">812</FONT>         * &lt;pre&gt;<a name="line.812"></a>
<FONT color="green">813</FONT>         * C:\a\b\c.txt --&gt; C:\a\b\<a name="line.813"></a>
<FONT color="green">814</FONT>         * ~/a/b/c.txt  --&gt; ~/a/b/<a name="line.814"></a>
<FONT color="green">815</FONT>         * a.txt        --&gt; ""<a name="line.815"></a>
<FONT color="green">816</FONT>         * a/b/c        --&gt; a/b/<a name="line.816"></a>
<FONT color="green">817</FONT>         * a/b/c/       --&gt; a/b/c/<a name="line.817"></a>
<FONT color="green">818</FONT>         * C:           --&gt; C:<a name="line.818"></a>
<FONT color="green">819</FONT>         * C:\          --&gt; C:\<a name="line.819"></a>
<FONT color="green">820</FONT>         * ~            --&gt; ~/<a name="line.820"></a>
<FONT color="green">821</FONT>         * ~/           --&gt; ~/<a name="line.821"></a>
<FONT color="green">822</FONT>         * ~user        --&gt; ~user/<a name="line.822"></a>
<FONT color="green">823</FONT>         * ~user/       --&gt; ~user/<a name="line.823"></a>
<FONT color="green">824</FONT>         * &lt;/pre&gt;<a name="line.824"></a>
<FONT color="green">825</FONT>         * &lt;p&gt;<a name="line.825"></a>
<FONT color="green">826</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.826"></a>
<FONT color="green">827</FONT>         *<a name="line.827"></a>
<FONT color="green">828</FONT>         * @param filename  the filename to query, null returns null<a name="line.828"></a>
<FONT color="green">829</FONT>         * @return the path of the file, an empty string if none exists, null if invalid<a name="line.829"></a>
<FONT color="green">830</FONT>         */<a name="line.830"></a>
<FONT color="green">831</FONT>        public static String getFullPath(String filename) {<a name="line.831"></a>
<FONT color="green">832</FONT>            return doGetFullPath(filename, true);<a name="line.832"></a>
<FONT color="green">833</FONT>        }<a name="line.833"></a>
<FONT color="green">834</FONT>    <a name="line.834"></a>
<FONT color="green">835</FONT>        /**<a name="line.835"></a>
<FONT color="green">836</FONT>         * Gets the full path from a full filename, which is the prefix + path,<a name="line.836"></a>
<FONT color="green">837</FONT>         * and also excluding the final directory separator.<a name="line.837"></a>
<FONT color="green">838</FONT>         * &lt;p&gt;<a name="line.838"></a>
<FONT color="green">839</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.839"></a>
<FONT color="green">840</FONT>         * The method is entirely text based, and returns the text before the<a name="line.840"></a>
<FONT color="green">841</FONT>         * last forward or backslash.<a name="line.841"></a>
<FONT color="green">842</FONT>         * &lt;pre&gt;<a name="line.842"></a>
<FONT color="green">843</FONT>         * C:\a\b\c.txt --&gt; C:\a\b<a name="line.843"></a>
<FONT color="green">844</FONT>         * ~/a/b/c.txt  --&gt; ~/a/b<a name="line.844"></a>
<FONT color="green">845</FONT>         * a.txt        --&gt; ""<a name="line.845"></a>
<FONT color="green">846</FONT>         * a/b/c        --&gt; a/b<a name="line.846"></a>
<FONT color="green">847</FONT>         * a/b/c/       --&gt; a/b/c<a name="line.847"></a>
<FONT color="green">848</FONT>         * C:           --&gt; C:<a name="line.848"></a>
<FONT color="green">849</FONT>         * C:\          --&gt; C:\<a name="line.849"></a>
<FONT color="green">850</FONT>         * ~            --&gt; ~<a name="line.850"></a>
<FONT color="green">851</FONT>         * ~/           --&gt; ~<a name="line.851"></a>
<FONT color="green">852</FONT>         * ~user        --&gt; ~user<a name="line.852"></a>
<FONT color="green">853</FONT>         * ~user/       --&gt; ~user<a name="line.853"></a>
<FONT color="green">854</FONT>         * &lt;/pre&gt;<a name="line.854"></a>
<FONT color="green">855</FONT>         * &lt;p&gt;<a name="line.855"></a>
<FONT color="green">856</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.856"></a>
<FONT color="green">857</FONT>         *<a name="line.857"></a>
<FONT color="green">858</FONT>         * @param filename  the filename to query, null returns null<a name="line.858"></a>
<FONT color="green">859</FONT>         * @return the path of the file, an empty string if none exists, null if invalid<a name="line.859"></a>
<FONT color="green">860</FONT>         */<a name="line.860"></a>
<FONT color="green">861</FONT>        public static String getFullPathNoEndSeparator(String filename) {<a name="line.861"></a>
<FONT color="green">862</FONT>            return doGetFullPath(filename, false);<a name="line.862"></a>
<FONT color="green">863</FONT>        }<a name="line.863"></a>
<FONT color="green">864</FONT>    <a name="line.864"></a>
<FONT color="green">865</FONT>        /**<a name="line.865"></a>
<FONT color="green">866</FONT>         * Does the work of getting the path.<a name="line.866"></a>
<FONT color="green">867</FONT>         * <a name="line.867"></a>
<FONT color="green">868</FONT>         * @param filename  the filename<a name="line.868"></a>
<FONT color="green">869</FONT>         * @param includeSeparator  true to include the end separator<a name="line.869"></a>
<FONT color="green">870</FONT>         * @return the path<a name="line.870"></a>
<FONT color="green">871</FONT>         */<a name="line.871"></a>
<FONT color="green">872</FONT>        private static String doGetFullPath(String filename, boolean includeSeparator) {<a name="line.872"></a>
<FONT color="green">873</FONT>            if (filename == null) {<a name="line.873"></a>
<FONT color="green">874</FONT>                return null;<a name="line.874"></a>
<FONT color="green">875</FONT>            }<a name="line.875"></a>
<FONT color="green">876</FONT>            int prefix = getPrefixLength(filename);<a name="line.876"></a>
<FONT color="green">877</FONT>            if (prefix &lt; 0) {<a name="line.877"></a>
<FONT color="green">878</FONT>                return null;<a name="line.878"></a>
<FONT color="green">879</FONT>            }<a name="line.879"></a>
<FONT color="green">880</FONT>            if (prefix &gt;= filename.length()) {<a name="line.880"></a>
<FONT color="green">881</FONT>                if (includeSeparator) {<a name="line.881"></a>
<FONT color="green">882</FONT>                    return getPrefix(filename);  // add end slash if necessary<a name="line.882"></a>
<FONT color="green">883</FONT>                } else {<a name="line.883"></a>
<FONT color="green">884</FONT>                    return filename;<a name="line.884"></a>
<FONT color="green">885</FONT>                }<a name="line.885"></a>
<FONT color="green">886</FONT>            }<a name="line.886"></a>
<FONT color="green">887</FONT>            int index = indexOfLastSeparator(filename);<a name="line.887"></a>
<FONT color="green">888</FONT>            if (index &lt; 0) {<a name="line.888"></a>
<FONT color="green">889</FONT>                return filename.substring(0, prefix);<a name="line.889"></a>
<FONT color="green">890</FONT>            }<a name="line.890"></a>
<FONT color="green">891</FONT>            int end = index + (includeSeparator ?  1 : 0);<a name="line.891"></a>
<FONT color="green">892</FONT>            if (end == 0) {<a name="line.892"></a>
<FONT color="green">893</FONT>                end++;<a name="line.893"></a>
<FONT color="green">894</FONT>            }<a name="line.894"></a>
<FONT color="green">895</FONT>            return filename.substring(0, end);<a name="line.895"></a>
<FONT color="green">896</FONT>        }<a name="line.896"></a>
<FONT color="green">897</FONT>    <a name="line.897"></a>
<FONT color="green">898</FONT>        /**<a name="line.898"></a>
<FONT color="green">899</FONT>         * Gets the name minus the path from a full filename.<a name="line.899"></a>
<FONT color="green">900</FONT>         * &lt;p&gt;<a name="line.900"></a>
<FONT color="green">901</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.901"></a>
<FONT color="green">902</FONT>         * The text after the last forward or backslash is returned.<a name="line.902"></a>
<FONT color="green">903</FONT>         * &lt;pre&gt;<a name="line.903"></a>
<FONT color="green">904</FONT>         * a/b/c.txt --&gt; c.txt<a name="line.904"></a>
<FONT color="green">905</FONT>         * a.txt     --&gt; a.txt<a name="line.905"></a>
<FONT color="green">906</FONT>         * a/b/c     --&gt; c<a name="line.906"></a>
<FONT color="green">907</FONT>         * a/b/c/    --&gt; ""<a name="line.907"></a>
<FONT color="green">908</FONT>         * &lt;/pre&gt;<a name="line.908"></a>
<FONT color="green">909</FONT>         * &lt;p&gt;<a name="line.909"></a>
<FONT color="green">910</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.910"></a>
<FONT color="green">911</FONT>         *<a name="line.911"></a>
<FONT color="green">912</FONT>         * @param filename  the filename to query, null returns null<a name="line.912"></a>
<FONT color="green">913</FONT>         * @return the name of the file without the path, or an empty string if none exists<a name="line.913"></a>
<FONT color="green">914</FONT>         */<a name="line.914"></a>
<FONT color="green">915</FONT>        public static String getName(String filename) {<a name="line.915"></a>
<FONT color="green">916</FONT>            if (filename == null) {<a name="line.916"></a>
<FONT color="green">917</FONT>                return null;<a name="line.917"></a>
<FONT color="green">918</FONT>            }<a name="line.918"></a>
<FONT color="green">919</FONT>            int index = indexOfLastSeparator(filename);<a name="line.919"></a>
<FONT color="green">920</FONT>            return filename.substring(index + 1);<a name="line.920"></a>
<FONT color="green">921</FONT>        }<a name="line.921"></a>
<FONT color="green">922</FONT>    <a name="line.922"></a>
<FONT color="green">923</FONT>        /**<a name="line.923"></a>
<FONT color="green">924</FONT>         * Gets the base name, minus the full path and extension, from a full filename.<a name="line.924"></a>
<FONT color="green">925</FONT>         * &lt;p&gt;<a name="line.925"></a>
<FONT color="green">926</FONT>         * This method will handle a file in either Unix or Windows format.<a name="line.926"></a>
<FONT color="green">927</FONT>         * The text after the last forward or backslash and before the last dot is returned.<a name="line.927"></a>
<FONT color="green">928</FONT>         * &lt;pre&gt;<a name="line.928"></a>
<FONT color="green">929</FONT>         * a/b/c.txt --&gt; c<a name="line.929"></a>
<FONT color="green">930</FONT>         * a.txt     --&gt; a<a name="line.930"></a>
<FONT color="green">931</FONT>         * a/b/c     --&gt; c<a name="line.931"></a>
<FONT color="green">932</FONT>         * a/b/c/    --&gt; ""<a name="line.932"></a>
<FONT color="green">933</FONT>         * &lt;/pre&gt;<a name="line.933"></a>
<FONT color="green">934</FONT>         * &lt;p&gt;<a name="line.934"></a>
<FONT color="green">935</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.935"></a>
<FONT color="green">936</FONT>         *<a name="line.936"></a>
<FONT color="green">937</FONT>         * @param filename  the filename to query, null returns null<a name="line.937"></a>
<FONT color="green">938</FONT>         * @return the name of the file without the path, or an empty string if none exists<a name="line.938"></a>
<FONT color="green">939</FONT>         */<a name="line.939"></a>
<FONT color="green">940</FONT>        public static String getBaseName(String filename) {<a name="line.940"></a>
<FONT color="green">941</FONT>            return removeExtension(getName(filename));<a name="line.941"></a>
<FONT color="green">942</FONT>        }<a name="line.942"></a>
<FONT color="green">943</FONT>    <a name="line.943"></a>
<FONT color="green">944</FONT>        /**<a name="line.944"></a>
<FONT color="green">945</FONT>         * Gets the extension of a filename.<a name="line.945"></a>
<FONT color="green">946</FONT>         * &lt;p&gt;<a name="line.946"></a>
<FONT color="green">947</FONT>         * This method returns the textual part of the filename after the last dot.<a name="line.947"></a>
<FONT color="green">948</FONT>         * There must be no directory separator after the dot.<a name="line.948"></a>
<FONT color="green">949</FONT>         * &lt;pre&gt;<a name="line.949"></a>
<FONT color="green">950</FONT>         * foo.txt      --&gt; "txt"<a name="line.950"></a>
<FONT color="green">951</FONT>         * a/b/c.jpg    --&gt; "jpg"<a name="line.951"></a>
<FONT color="green">952</FONT>         * a/b.txt/c    --&gt; ""<a name="line.952"></a>
<FONT color="green">953</FONT>         * a/b/c        --&gt; ""<a name="line.953"></a>
<FONT color="green">954</FONT>         * &lt;/pre&gt;<a name="line.954"></a>
<FONT color="green">955</FONT>         * &lt;p&gt;<a name="line.955"></a>
<FONT color="green">956</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.956"></a>
<FONT color="green">957</FONT>         *<a name="line.957"></a>
<FONT color="green">958</FONT>         * @param filename the filename to retrieve the extension of.<a name="line.958"></a>
<FONT color="green">959</FONT>         * @return the extension of the file or an empty string if none exists or &lt;code&gt;null&lt;/code&gt;<a name="line.959"></a>
<FONT color="green">960</FONT>         * if the filename is &lt;code&gt;null&lt;/code&gt;.<a name="line.960"></a>
<FONT color="green">961</FONT>         */<a name="line.961"></a>
<FONT color="green">962</FONT>        public static String getExtension(String filename) {<a name="line.962"></a>
<FONT color="green">963</FONT>            if (filename == null) {<a name="line.963"></a>
<FONT color="green">964</FONT>                return null;<a name="line.964"></a>
<FONT color="green">965</FONT>            }<a name="line.965"></a>
<FONT color="green">966</FONT>            int index = indexOfExtension(filename);<a name="line.966"></a>
<FONT color="green">967</FONT>            if (index == -1) {<a name="line.967"></a>
<FONT color="green">968</FONT>                return "";<a name="line.968"></a>
<FONT color="green">969</FONT>            } else {<a name="line.969"></a>
<FONT color="green">970</FONT>                return filename.substring(index + 1);<a name="line.970"></a>
<FONT color="green">971</FONT>            }<a name="line.971"></a>
<FONT color="green">972</FONT>        }<a name="line.972"></a>
<FONT color="green">973</FONT>    <a name="line.973"></a>
<FONT color="green">974</FONT>        //-----------------------------------------------------------------------<a name="line.974"></a>
<FONT color="green">975</FONT>        /**<a name="line.975"></a>
<FONT color="green">976</FONT>         * Removes the extension from a filename.<a name="line.976"></a>
<FONT color="green">977</FONT>         * &lt;p&gt;<a name="line.977"></a>
<FONT color="green">978</FONT>         * This method returns the textual part of the filename before the last dot.<a name="line.978"></a>
<FONT color="green">979</FONT>         * There must be no directory separator after the dot.<a name="line.979"></a>
<FONT color="green">980</FONT>         * &lt;pre&gt;<a name="line.980"></a>
<FONT color="green">981</FONT>         * foo.txt    --&gt; foo<a name="line.981"></a>
<FONT color="green">982</FONT>         * a\b\c.jpg  --&gt; a\b\c<a name="line.982"></a>
<FONT color="green">983</FONT>         * a\b\c      --&gt; a\b\c<a name="line.983"></a>
<FONT color="green">984</FONT>         * a.b\c      --&gt; a.b\c<a name="line.984"></a>
<FONT color="green">985</FONT>         * &lt;/pre&gt;<a name="line.985"></a>
<FONT color="green">986</FONT>         * &lt;p&gt;<a name="line.986"></a>
<FONT color="green">987</FONT>         * The output will be the same irrespective of the machine that the code is running on.<a name="line.987"></a>
<FONT color="green">988</FONT>         *<a name="line.988"></a>
<FONT color="green">989</FONT>         * @param filename  the filename to query, null returns null<a name="line.989"></a>
<FONT color="green">990</FONT>         * @return the filename minus the extension<a name="line.990"></a>
<FONT color="green">991</FONT>         */<a name="line.991"></a>
<FONT color="green">992</FONT>        public static String removeExtension(String filename) {<a name="line.992"></a>
<FONT color="green">993</FONT>            if (filename == null) {<a name="line.993"></a>
<FONT color="green">994</FONT>                return null;<a name="line.994"></a>
<FONT color="green">995</FONT>            }<a name="line.995"></a>
<FONT color="green">996</FONT>            int index = indexOfExtension(filename);<a name="line.996"></a>
<FONT color="green">997</FONT>            if (index == -1) {<a name="line.997"></a>
<FONT color="green">998</FONT>                return filename;<a name="line.998"></a>
<FONT color="green">999</FONT>            } else {<a name="line.999"></a>
<FONT color="green">1000</FONT>                return filename.substring(0, index);<a name="line.1000"></a>
<FONT color="green">1001</FONT>            }<a name="line.1001"></a>
<FONT color="green">1002</FONT>        }<a name="line.1002"></a>
<FONT color="green">1003</FONT>    <a name="line.1003"></a>
<FONT color="green">1004</FONT>        //-----------------------------------------------------------------------<a name="line.1004"></a>
<FONT color="green">1005</FONT>        /**<a name="line.1005"></a>
<FONT color="green">1006</FONT>         * Checks whether two filenames are equal exactly.<a name="line.1006"></a>
<FONT color="green">1007</FONT>         * &lt;p&gt;<a name="line.1007"></a>
<FONT color="green">1008</FONT>         * No processing is performed on the filenames other than comparison,<a name="line.1008"></a>
<FONT color="green">1009</FONT>         * thus this is merely a null-safe case-sensitive equals.<a name="line.1009"></a>
<FONT color="green">1010</FONT>         *<a name="line.1010"></a>
<FONT color="green">1011</FONT>         * @param filename1  the first filename to query, may be null<a name="line.1011"></a>
<FONT color="green">1012</FONT>         * @param filename2  the second filename to query, may be null<a name="line.1012"></a>
<FONT color="green">1013</FONT>         * @return true if the filenames are equal, null equals null<a name="line.1013"></a>
<FONT color="green">1014</FONT>         * @see IOCase#SENSITIVE<a name="line.1014"></a>
<FONT color="green">1015</FONT>         */<a name="line.1015"></a>
<FONT color="green">1016</FONT>        public static boolean equals(String filename1, String filename2) {<a name="line.1016"></a>
<FONT color="green">1017</FONT>            return equals(filename1, filename2, false, IOCase.SENSITIVE);<a name="line.1017"></a>
<FONT color="green">1018</FONT>        }<a name="line.1018"></a>
<FONT color="green">1019</FONT>    <a name="line.1019"></a>
<FONT color="green">1020</FONT>        /**<a name="line.1020"></a>
<FONT color="green">1021</FONT>         * Checks whether two filenames are equal using the case rules of the system.<a name="line.1021"></a>
<FONT color="green">1022</FONT>         * &lt;p&gt;<a name="line.1022"></a>
<FONT color="green">1023</FONT>         * No processing is performed on the filenames other than comparison.<a name="line.1023"></a>
<FONT color="green">1024</FONT>         * The check is case-sensitive on Unix and case-insensitive on Windows.<a name="line.1024"></a>
<FONT color="green">1025</FONT>         *<a name="line.1025"></a>
<FONT color="green">1026</FONT>         * @param filename1  the first filename to query, may be null<a name="line.1026"></a>
<FONT color="green">1027</FONT>         * @param filename2  the second filename to query, may be null<a name="line.1027"></a>
<FONT color="green">1028</FONT>         * @return true if the filenames are equal, null equals null<a name="line.1028"></a>
<FONT color="green">1029</FONT>         * @see IOCase#SYSTEM<a name="line.1029"></a>
<FONT color="green">1030</FONT>         */<a name="line.1030"></a>
<FONT color="green">1031</FONT>        public static boolean equalsOnSystem(String filename1, String filename2) {<a name="line.1031"></a>
<FONT color="green">1032</FONT>            return equals(filename1, filename2, false, IOCase.SYSTEM);<a name="line.1032"></a>
<FONT color="green">1033</FONT>        }<a name="line.1033"></a>
<FONT color="green">1034</FONT>    <a name="line.1034"></a>
<FONT color="green">1035</FONT>        //-----------------------------------------------------------------------<a name="line.1035"></a>
<FONT color="green">1036</FONT>        /**<a name="line.1036"></a>
<FONT color="green">1037</FONT>         * Checks whether two filenames are equal after both have been normalized.<a name="line.1037"></a>
<FONT color="green">1038</FONT>         * &lt;p&gt;<a name="line.1038"></a>
<FONT color="green">1039</FONT>         * Both filenames are first passed to {@link #normalize(String)}.<a name="line.1039"></a>
<FONT color="green">1040</FONT>         * The check is then performed in a case-sensitive manner.<a name="line.1040"></a>
<FONT color="green">1041</FONT>         *<a name="line.1041"></a>
<FONT color="green">1042</FONT>         * @param filename1  the first filename to query, may be null<a name="line.1042"></a>
<FONT color="green">1043</FONT>         * @param filename2  the second filename to query, may be null<a name="line.1043"></a>
<FONT color="green">1044</FONT>         * @return true if the filenames are equal, null equals null<a name="line.1044"></a>
<FONT color="green">1045</FONT>         * @see IOCase#SENSITIVE<a name="line.1045"></a>
<FONT color="green">1046</FONT>         */<a name="line.1046"></a>
<FONT color="green">1047</FONT>        public static boolean equalsNormalized(String filename1, String filename2) {<a name="line.1047"></a>
<FONT color="green">1048</FONT>            return equals(filename1, filename2, true, IOCase.SENSITIVE);<a name="line.1048"></a>
<FONT color="green">1049</FONT>        }<a name="line.1049"></a>
<FONT color="green">1050</FONT>    <a name="line.1050"></a>
<FONT color="green">1051</FONT>        /**<a name="line.1051"></a>
<FONT color="green">1052</FONT>         * Checks whether two filenames are equal after both have been normalized<a name="line.1052"></a>
<FONT color="green">1053</FONT>         * and using the case rules of the system.<a name="line.1053"></a>
<FONT color="green">1054</FONT>         * &lt;p&gt;<a name="line.1054"></a>
<FONT color="green">1055</FONT>         * Both filenames are first passed to {@link #normalize(String)}.<a name="line.1055"></a>
<FONT color="green">1056</FONT>         * The check is then performed case-sensitive on Unix and<a name="line.1056"></a>
<FONT color="green">1057</FONT>         * case-insensitive on Windows.<a name="line.1057"></a>
<FONT color="green">1058</FONT>         *<a name="line.1058"></a>
<FONT color="green">1059</FONT>         * @param filename1  the first filename to query, may be null<a name="line.1059"></a>
<FONT color="green">1060</FONT>         * @param filename2  the second filename to query, may be null<a name="line.1060"></a>
<FONT color="green">1061</FONT>         * @return true if the filenames are equal, null equals null<a name="line.1061"></a>
<FONT color="green">1062</FONT>         * @see IOCase#SYSTEM<a name="line.1062"></a>
<FONT color="green">1063</FONT>         */<a name="line.1063"></a>
<FONT color="green">1064</FONT>        public static boolean equalsNormalizedOnSystem(String filename1, String filename2) {<a name="line.1064"></a>
<FONT color="green">1065</FONT>            return equals(filename1, filename2, true, IOCase.SYSTEM);<a name="line.1065"></a>
<FONT color="green">1066</FONT>        }<a name="line.1066"></a>
<FONT color="green">1067</FONT>    <a name="line.1067"></a>
<FONT color="green">1068</FONT>        /**<a name="line.1068"></a>
<FONT color="green">1069</FONT>         * Checks whether two filenames are equal, optionally normalizing and providing<a name="line.1069"></a>
<FONT color="green">1070</FONT>         * control over the case-sensitivity.<a name="line.1070"></a>
<FONT color="green">1071</FONT>         *<a name="line.1071"></a>
<FONT color="green">1072</FONT>         * @param filename1  the first filename to query, may be null<a name="line.1072"></a>
<FONT color="green">1073</FONT>         * @param filename2  the second filename to query, may be null<a name="line.1073"></a>
<FONT color="green">1074</FONT>         * @param normalized  whether to normalize the filenames<a name="line.1074"></a>
<FONT color="green">1075</FONT>         * @param caseSensitivity  what case sensitivity rule to use, null means case-sensitive<a name="line.1075"></a>
<FONT color="green">1076</FONT>         * @return true if the filenames are equal, null equals null<a name="line.1076"></a>
<FONT color="green">1077</FONT>         * @since Commons IO 1.3<a name="line.1077"></a>
<FONT color="green">1078</FONT>         */<a name="line.1078"></a>
<FONT color="green">1079</FONT>        public static boolean equals(<a name="line.1079"></a>
<FONT color="green">1080</FONT>                String filename1, String filename2,<a name="line.1080"></a>
<FONT color="green">1081</FONT>                boolean normalized, IOCase caseSensitivity) {<a name="line.1081"></a>
<FONT color="green">1082</FONT>            <a name="line.1082"></a>
<FONT color="green">1083</FONT>            if (filename1 == null || filename2 == null) {<a name="line.1083"></a>
<FONT color="green">1084</FONT>                return (filename1 == null &amp;&amp; filename2 == null);<a name="line.1084"></a>
<FONT color="green">1085</FONT>            }<a name="line.1085"></a>
<FONT color="green">1086</FONT>            if (normalized) {<a name="line.1086"></a>
<FONT color="green">1087</FONT>                filename1 = normalize(filename1);<a name="line.1087"></a>
<FONT color="green">1088</FONT>                filename2 = normalize(filename2);<a name="line.1088"></a>
<FONT color="green">1089</FONT>                if (filename1 == null || filename2 == null) {<a name="line.1089"></a>
<FONT color="green">1090</FONT>                    throw new NullPointerException(<a name="line.1090"></a>
<FONT color="green">1091</FONT>                        "Error normalizing one or both of the file names");<a name="line.1091"></a>
<FONT color="green">1092</FONT>                }<a name="line.1092"></a>
<FONT color="green">1093</FONT>            }<a name="line.1093"></a>
<FONT color="green">1094</FONT>            if (caseSensitivity == null) {<a name="line.1094"></a>
<FONT color="green">1095</FONT>                caseSensitivity = IOCase.SENSITIVE;<a name="line.1095"></a>
<FONT color="green">1096</FONT>            }<a name="line.1096"></a>
<FONT color="green">1097</FONT>            return caseSensitivity.checkEquals(filename1, filename2);<a name="line.1097"></a>
<FONT color="green">1098</FONT>        }<a name="line.1098"></a>
<FONT color="green">1099</FONT>    <a name="line.1099"></a>
<FONT color="green">1100</FONT>        //-----------------------------------------------------------------------<a name="line.1100"></a>
<FONT color="green">1101</FONT>        /**<a name="line.1101"></a>
<FONT color="green">1102</FONT>         * Checks whether the extension of the filename is that specified.<a name="line.1102"></a>
<FONT color="green">1103</FONT>         * &lt;p&gt;<a name="line.1103"></a>
<FONT color="green">1104</FONT>         * This method obtains the extension as the textual part of the filename<a name="line.1104"></a>
<FONT color="green">1105</FONT>         * after the last dot. There must be no directory separator after the dot.<a name="line.1105"></a>
<FONT color="green">1106</FONT>         * The extension check is case-sensitive on all platforms.<a name="line.1106"></a>
<FONT color="green">1107</FONT>         *<a name="line.1107"></a>
<FONT color="green">1108</FONT>         * @param filename  the filename to query, null returns false<a name="line.1108"></a>
<FONT color="green">1109</FONT>         * @param extension  the extension to check for, null or empty checks for no extension<a name="line.1109"></a>
<FONT color="green">1110</FONT>         * @return true if the filename has the specified extension<a name="line.1110"></a>
<FONT color="green">1111</FONT>         */<a name="line.1111"></a>
<FONT color="green">1112</FONT>        public static boolean isExtension(String filename, String extension) {<a name="line.1112"></a>
<FONT color="green">1113</FONT>            if (filename == null) {<a name="line.1113"></a>
<FONT color="green">1114</FONT>                return false;<a name="line.1114"></a>
<FONT color="green">1115</FONT>            }<a name="line.1115"></a>
<FONT color="green">1116</FONT>            if (extension == null || extension.length() == 0) {<a name="line.1116"></a>
<FONT color="green">1117</FONT>                return (indexOfExtension(filename) == -1);<a name="line.1117"></a>
<FONT color="green">1118</FONT>            }<a name="line.1118"></a>
<FONT color="green">1119</FONT>            String fileExt = getExtension(filename);<a name="line.1119"></a>
<FONT color="green">1120</FONT>            return fileExt.equals(extension);<a name="line.1120"></a>
<FONT color="green">1121</FONT>        }<a name="line.1121"></a>
<FONT color="green">1122</FONT>    <a name="line.1122"></a>
<FONT color="green">1123</FONT>        /**<a name="line.1123"></a>
<FONT color="green">1124</FONT>         * Checks whether the extension of the filename is one of those specified.<a name="line.1124"></a>
<FONT color="green">1125</FONT>         * &lt;p&gt;<a name="line.1125"></a>
<FONT color="green">1126</FONT>         * This method obtains the extension as the textual part of the filename<a name="line.1126"></a>
<FONT color="green">1127</FONT>         * after the last dot. There must be no directory separator after the dot.<a name="line.1127"></a>
<FONT color="green">1128</FONT>         * The extension check is case-sensitive on all platforms.<a name="line.1128"></a>
<FONT color="green">1129</FONT>         *<a name="line.1129"></a>
<FONT color="green">1130</FONT>         * @param filename  the filename to query, null returns false<a name="line.1130"></a>
<FONT color="green">1131</FONT>         * @param extensions  the extensions to check for, null checks for no extension<a name="line.1131"></a>
<FONT color="green">1132</FONT>         * @return true if the filename is one of the extensions<a name="line.1132"></a>
<FONT color="green">1133</FONT>         */<a name="line.1133"></a>
<FONT color="green">1134</FONT>        public static boolean isExtension(String filename, String[] extensions) {<a name="line.1134"></a>
<FONT color="green">1135</FONT>            if (filename == null) {<a name="line.1135"></a>
<FONT color="green">1136</FONT>                return false;<a name="line.1136"></a>
<FONT color="green">1137</FONT>            }<a name="line.1137"></a>
<FONT color="green">1138</FONT>            if (extensions == null || extensions.length == 0) {<a name="line.1138"></a>
<FONT color="green">1139</FONT>                return (indexOfExtension(filename) == -1);<a name="line.1139"></a>
<FONT color="green">1140</FONT>            }<a name="line.1140"></a>
<FONT color="green">1141</FONT>            String fileExt = getExtension(filename);<a name="line.1141"></a>
<FONT color="green">1142</FONT>            for (String extension : extensions) {<a name="line.1142"></a>
<FONT color="green">1143</FONT>                if (fileExt.equals(extension)) {<a name="line.1143"></a>
<FONT color="green">1144</FONT>                    return true;<a name="line.1144"></a>
<FONT color="green">1145</FONT>                }<a name="line.1145"></a>
<FONT color="green">1146</FONT>            }<a name="line.1146"></a>
<FONT color="green">1147</FONT>            return false;<a name="line.1147"></a>
<FONT color="green">1148</FONT>        }<a name="line.1148"></a>
<FONT color="green">1149</FONT>    <a name="line.1149"></a>
<FONT color="green">1150</FONT>        /**<a name="line.1150"></a>
<FONT color="green">1151</FONT>         * Checks whether the extension of the filename is one of those specified.<a name="line.1151"></a>
<FONT color="green">1152</FONT>         * &lt;p&gt;<a name="line.1152"></a>
<FONT color="green">1153</FONT>         * This method obtains the extension as the textual part of the filename<a name="line.1153"></a>
<FONT color="green">1154</FONT>         * after the last dot. There must be no directory separator after the dot.<a name="line.1154"></a>
<FONT color="green">1155</FONT>         * The extension check is case-sensitive on all platforms.<a name="line.1155"></a>
<FONT color="green">1156</FONT>         *<a name="line.1156"></a>
<FONT color="green">1157</FONT>         * @param filename  the filename to query, null returns false<a name="line.1157"></a>
<FONT color="green">1158</FONT>         * @param extensions  the extensions to check for, null checks for no extension<a name="line.1158"></a>
<FONT color="green">1159</FONT>         * @return true if the filename is one of the extensions<a name="line.1159"></a>
<FONT color="green">1160</FONT>         */<a name="line.1160"></a>
<FONT color="green">1161</FONT>        public static boolean isExtension(String filename, Collection&lt;String&gt; extensions) {<a name="line.1161"></a>
<FONT color="green">1162</FONT>            if (filename == null) {<a name="line.1162"></a>
<FONT color="green">1163</FONT>                return false;<a name="line.1163"></a>
<FONT color="green">1164</FONT>            }<a name="line.1164"></a>
<FONT color="green">1165</FONT>            if (extensions == null || extensions.isEmpty()) {<a name="line.1165"></a>
<FONT color="green">1166</FONT>                return (indexOfExtension(filename) == -1);<a name="line.1166"></a>
<FONT color="green">1167</FONT>            }<a name="line.1167"></a>
<FONT color="green">1168</FONT>            String fileExt = getExtension(filename);<a name="line.1168"></a>
<FONT color="green">1169</FONT>            for (String extension : extensions) {<a name="line.1169"></a>
<FONT color="green">1170</FONT>                if (fileExt.equals(extension)) {<a name="line.1170"></a>
<FONT color="green">1171</FONT>                    return true;<a name="line.1171"></a>
<FONT color="green">1172</FONT>                }<a name="line.1172"></a>
<FONT color="green">1173</FONT>            }<a name="line.1173"></a>
<FONT color="green">1174</FONT>            return false;<a name="line.1174"></a>
<FONT color="green">1175</FONT>        }<a name="line.1175"></a>
<FONT color="green">1176</FONT>    <a name="line.1176"></a>
<FONT color="green">1177</FONT>        //-----------------------------------------------------------------------<a name="line.1177"></a>
<FONT color="green">1178</FONT>        /**<a name="line.1178"></a>
<FONT color="green">1179</FONT>         * Checks a filename to see if it matches the specified wildcard matcher,<a name="line.1179"></a>
<FONT color="green">1180</FONT>         * always testing case-sensitive.<a name="line.1180"></a>
<FONT color="green">1181</FONT>         * &lt;p&gt;<a name="line.1181"></a>
<FONT color="green">1182</FONT>         * The wildcard matcher uses the characters '?' and '*' to represent a<a name="line.1182"></a>
<FONT color="green">1183</FONT>         * single or multiple (zero or more) wildcard characters.<a name="line.1183"></a>
<FONT color="green">1184</FONT>         * This is the same as often found on Dos/Unix command lines.<a name="line.1184"></a>
<FONT color="green">1185</FONT>         * The check is case-sensitive always.<a name="line.1185"></a>
<FONT color="green">1186</FONT>         * &lt;pre&gt;<a name="line.1186"></a>
<FONT color="green">1187</FONT>         * wildcardMatch("c.txt", "*.txt")      --&gt; true<a name="line.1187"></a>
<FONT color="green">1188</FONT>         * wildcardMatch("c.txt", "*.jpg")      --&gt; false<a name="line.1188"></a>
<FONT color="green">1189</FONT>         * wildcardMatch("a/b/c.txt", "a/b/*")  --&gt; true<a name="line.1189"></a>
<FONT color="green">1190</FONT>         * wildcardMatch("c.txt", "*.???")      --&gt; true<a name="line.1190"></a>
<FONT color="green">1191</FONT>         * wildcardMatch("c.txt", "*.????")     --&gt; false<a name="line.1191"></a>
<FONT color="green">1192</FONT>         * &lt;/pre&gt;<a name="line.1192"></a>
<FONT color="green">1193</FONT>         * N.B. the sequence "*?" does not work properly at present in match strings.<a name="line.1193"></a>
<FONT color="green">1194</FONT>         * <a name="line.1194"></a>
<FONT color="green">1195</FONT>         * @param filename  the filename to match on<a name="line.1195"></a>
<FONT color="green">1196</FONT>         * @param wildcardMatcher  the wildcard string to match against<a name="line.1196"></a>
<FONT color="green">1197</FONT>         * @return true if the filename matches the wilcard string<a name="line.1197"></a>
<FONT color="green">1198</FONT>         * @see IOCase#SENSITIVE<a name="line.1198"></a>
<FONT color="green">1199</FONT>         */<a name="line.1199"></a>
<FONT color="green">1200</FONT>        public static boolean wildcardMatch(String filename, String wildcardMatcher) {<a name="line.1200"></a>
<FONT color="green">1201</FONT>            return wildcardMatch(filename, wildcardMatcher, IOCase.SENSITIVE);<a name="line.1201"></a>
<FONT color="green">1202</FONT>        }<a name="line.1202"></a>
<FONT color="green">1203</FONT>    <a name="line.1203"></a>
<FONT color="green">1204</FONT>        /**<a name="line.1204"></a>
<FONT color="green">1205</FONT>         * Checks a filename to see if it matches the specified wildcard matcher<a name="line.1205"></a>
<FONT color="green">1206</FONT>         * using the case rules of the system.<a name="line.1206"></a>
<FONT color="green">1207</FONT>         * &lt;p&gt;<a name="line.1207"></a>
<FONT color="green">1208</FONT>         * The wildcard matcher uses the characters '?' and '*' to represent a<a name="line.1208"></a>
<FONT color="green">1209</FONT>         * single or multiple (zero or more) wildcard characters.<a name="line.1209"></a>
<FONT color="green">1210</FONT>         * This is the same as often found on Dos/Unix command lines.<a name="line.1210"></a>
<FONT color="green">1211</FONT>         * The check is case-sensitive on Unix and case-insensitive on Windows.<a name="line.1211"></a>
<FONT color="green">1212</FONT>         * &lt;pre&gt;<a name="line.1212"></a>
<FONT color="green">1213</FONT>         * wildcardMatch("c.txt", "*.txt")      --&gt; true<a name="line.1213"></a>
<FONT color="green">1214</FONT>         * wildcardMatch("c.txt", "*.jpg")      --&gt; false<a name="line.1214"></a>
<FONT color="green">1215</FONT>         * wildcardMatch("a/b/c.txt", "a/b/*")  --&gt; true<a name="line.1215"></a>
<FONT color="green">1216</FONT>         * wildcardMatch("c.txt", "*.???")      --&gt; true<a name="line.1216"></a>
<FONT color="green">1217</FONT>         * wildcardMatch("c.txt", "*.????")     --&gt; false<a name="line.1217"></a>
<FONT color="green">1218</FONT>         * &lt;/pre&gt;<a name="line.1218"></a>
<FONT color="green">1219</FONT>         * N.B. the sequence "*?" does not work properly at present in match strings.<a name="line.1219"></a>
<FONT color="green">1220</FONT>         * <a name="line.1220"></a>
<FONT color="green">1221</FONT>         * @param filename  the filename to match on<a name="line.1221"></a>
<FONT color="green">1222</FONT>         * @param wildcardMatcher  the wildcard string to match against<a name="line.1222"></a>
<FONT color="green">1223</FONT>         * @return true if the filename matches the wilcard string<a name="line.1223"></a>
<FONT color="green">1224</FONT>         * @see IOCase#SYSTEM<a name="line.1224"></a>
<FONT color="green">1225</FONT>         */<a name="line.1225"></a>
<FONT color="green">1226</FONT>        public static boolean wildcardMatchOnSystem(String filename, String wildcardMatcher) {<a name="line.1226"></a>
<FONT color="green">1227</FONT>            return wildcardMatch(filename, wildcardMatcher, IOCase.SYSTEM);<a name="line.1227"></a>
<FONT color="green">1228</FONT>        }<a name="line.1228"></a>
<FONT color="green">1229</FONT>    <a name="line.1229"></a>
<FONT color="green">1230</FONT>        /**<a name="line.1230"></a>
<FONT color="green">1231</FONT>         * Checks a filename to see if it matches the specified wildcard matcher<a name="line.1231"></a>
<FONT color="green">1232</FONT>         * allowing control over case-sensitivity.<a name="line.1232"></a>
<FONT color="green">1233</FONT>         * &lt;p&gt;<a name="line.1233"></a>
<FONT color="green">1234</FONT>         * The wildcard matcher uses the characters '?' and '*' to represent a<a name="line.1234"></a>
<FONT color="green">1235</FONT>         * single or multiple (zero or more) wildcard characters.<a name="line.1235"></a>
<FONT color="green">1236</FONT>         * N.B. the sequence "*?" does not work properly at present in match strings.<a name="line.1236"></a>
<FONT color="green">1237</FONT>         * <a name="line.1237"></a>
<FONT color="green">1238</FONT>         * @param filename  the filename to match on<a name="line.1238"></a>
<FONT color="green">1239</FONT>         * @param wildcardMatcher  the wildcard string to match against<a name="line.1239"></a>
<FONT color="green">1240</FONT>         * @param caseSensitivity  what case sensitivity rule to use, null means case-sensitive<a name="line.1240"></a>
<FONT color="green">1241</FONT>         * @return true if the filename matches the wilcard string<a name="line.1241"></a>
<FONT color="green">1242</FONT>         * @since Commons IO 1.3<a name="line.1242"></a>
<FONT color="green">1243</FONT>         */<a name="line.1243"></a>
<FONT color="green">1244</FONT>        public static boolean wildcardMatch(String filename, String wildcardMatcher, IOCase caseSensitivity) {<a name="line.1244"></a>
<FONT color="green">1245</FONT>            if (filename == null &amp;&amp; wildcardMatcher == null) {<a name="line.1245"></a>
<FONT color="green">1246</FONT>                return true;<a name="line.1246"></a>
<FONT color="green">1247</FONT>            }<a name="line.1247"></a>
<FONT color="green">1248</FONT>            if (filename == null || wildcardMatcher == null) {<a name="line.1248"></a>
<FONT color="green">1249</FONT>                return false;<a name="line.1249"></a>
<FONT color="green">1250</FONT>            }<a name="line.1250"></a>
<FONT color="green">1251</FONT>            if (caseSensitivity == null) {<a name="line.1251"></a>
<FONT color="green">1252</FONT>                caseSensitivity = IOCase.SENSITIVE;<a name="line.1252"></a>
<FONT color="green">1253</FONT>            }<a name="line.1253"></a>
<FONT color="green">1254</FONT>            String[] wcs = splitOnTokens(wildcardMatcher);<a name="line.1254"></a>
<FONT color="green">1255</FONT>            boolean anyChars = false;<a name="line.1255"></a>
<FONT color="green">1256</FONT>            int textIdx = 0;<a name="line.1256"></a>
<FONT color="green">1257</FONT>            int wcsIdx = 0;<a name="line.1257"></a>
<FONT color="green">1258</FONT>            Stack&lt;int[]&gt; backtrack = new Stack&lt;int[]&gt;();<a name="line.1258"></a>
<FONT color="green">1259</FONT>            <a name="line.1259"></a>
<FONT color="green">1260</FONT>            // loop around a backtrack stack, to handle complex * matching<a name="line.1260"></a>
<FONT color="green">1261</FONT>            do {<a name="line.1261"></a>
<FONT color="green">1262</FONT>                if (backtrack.size() &gt; 0) {<a name="line.1262"></a>
<FONT color="green">1263</FONT>                    int[] array = backtrack.pop();<a name="line.1263"></a>
<FONT color="green">1264</FONT>                    wcsIdx = array[0];<a name="line.1264"></a>
<FONT color="green">1265</FONT>                    textIdx = array[1];<a name="line.1265"></a>
<FONT color="green">1266</FONT>                    anyChars = true;<a name="line.1266"></a>
<FONT color="green">1267</FONT>                }<a name="line.1267"></a>
<FONT color="green">1268</FONT>                <a name="line.1268"></a>
<FONT color="green">1269</FONT>                // loop whilst tokens and text left to process<a name="line.1269"></a>
<FONT color="green">1270</FONT>                while (wcsIdx &lt; wcs.length) {<a name="line.1270"></a>
<FONT color="green">1271</FONT>          <a name="line.1271"></a>
<FONT color="green">1272</FONT>                    if (wcs[wcsIdx].equals("?")) {<a name="line.1272"></a>
<FONT color="green">1273</FONT>                        // ? so move to next text char<a name="line.1273"></a>
<FONT color="green">1274</FONT>                        textIdx++;<a name="line.1274"></a>
<FONT color="green">1275</FONT>                        if (textIdx &gt; filename.length()) {<a name="line.1275"></a>
<FONT color="green">1276</FONT>                            break;<a name="line.1276"></a>
<FONT color="green">1277</FONT>                        }<a name="line.1277"></a>
<FONT color="green">1278</FONT>                        anyChars = false;<a name="line.1278"></a>
<FONT color="green">1279</FONT>                        <a name="line.1279"></a>
<FONT color="green">1280</FONT>                    } else if (wcs[wcsIdx].equals("*")) {<a name="line.1280"></a>
<FONT color="green">1281</FONT>                        // set any chars status<a name="line.1281"></a>
<FONT color="green">1282</FONT>                        anyChars = true;<a name="line.1282"></a>
<FONT color="green">1283</FONT>                        if (wcsIdx == wcs.length - 1) {<a name="line.1283"></a>
<FONT color="green">1284</FONT>                            textIdx = filename.length();<a name="line.1284"></a>
<FONT color="green">1285</FONT>                        }<a name="line.1285"></a>
<FONT color="green">1286</FONT>                        <a name="line.1286"></a>
<FONT color="green">1287</FONT>                    } else {<a name="line.1287"></a>
<FONT color="green">1288</FONT>                        // matching text token<a name="line.1288"></a>
<FONT color="green">1289</FONT>                        if (anyChars) {<a name="line.1289"></a>
<FONT color="green">1290</FONT>                            // any chars then try to locate text token<a name="line.1290"></a>
<FONT color="green">1291</FONT>                            textIdx = caseSensitivity.checkIndexOf(filename, textIdx, wcs[wcsIdx]);<a name="line.1291"></a>
<FONT color="green">1292</FONT>                            if (textIdx == -1) {<a name="line.1292"></a>
<FONT color="green">1293</FONT>                                // token not found<a name="line.1293"></a>
<FONT color="green">1294</FONT>                                break;<a name="line.1294"></a>
<FONT color="green">1295</FONT>                            }<a name="line.1295"></a>
<FONT color="green">1296</FONT>                            int repeat = caseSensitivity.checkIndexOf(filename, textIdx + 1, wcs[wcsIdx]);<a name="line.1296"></a>
<FONT color="green">1297</FONT>                            if (repeat &gt;= 0) {<a name="line.1297"></a>
<FONT color="green">1298</FONT>                                backtrack.push(new int[] {wcsIdx, repeat});<a name="line.1298"></a>
<FONT color="green">1299</FONT>                            }<a name="line.1299"></a>
<FONT color="green">1300</FONT>                        } else {<a name="line.1300"></a>
<FONT color="green">1301</FONT>                            // matching from current position<a name="line.1301"></a>
<FONT color="green">1302</FONT>                            if (!caseSensitivity.checkRegionMatches(filename, textIdx, wcs[wcsIdx])) {<a name="line.1302"></a>
<FONT color="green">1303</FONT>                                // couldnt match token<a name="line.1303"></a>
<FONT color="green">1304</FONT>                                break;<a name="line.1304"></a>
<FONT color="green">1305</FONT>                            }<a name="line.1305"></a>
<FONT color="green">1306</FONT>                        }<a name="line.1306"></a>
<FONT color="green">1307</FONT>          <a name="line.1307"></a>
<FONT color="green">1308</FONT>                        // matched text token, move text index to end of matched token<a name="line.1308"></a>
<FONT color="green">1309</FONT>                        textIdx += wcs[wcsIdx].length();<a name="line.1309"></a>
<FONT color="green">1310</FONT>                        anyChars = false;<a name="line.1310"></a>
<FONT color="green">1311</FONT>                    }<a name="line.1311"></a>
<FONT color="green">1312</FONT>          <a name="line.1312"></a>
<FONT color="green">1313</FONT>                    wcsIdx++;<a name="line.1313"></a>
<FONT color="green">1314</FONT>                }<a name="line.1314"></a>
<FONT color="green">1315</FONT>                <a name="line.1315"></a>
<FONT color="green">1316</FONT>                // full match<a name="line.1316"></a>
<FONT color="green">1317</FONT>                if (wcsIdx == wcs.length &amp;&amp; textIdx == filename.length()) {<a name="line.1317"></a>
<FONT color="green">1318</FONT>                    return true;<a name="line.1318"></a>
<FONT color="green">1319</FONT>                }<a name="line.1319"></a>
<FONT color="green">1320</FONT>                <a name="line.1320"></a>
<FONT color="green">1321</FONT>            } while (backtrack.size() &gt; 0);<a name="line.1321"></a>
<FONT color="green">1322</FONT>      <a name="line.1322"></a>
<FONT color="green">1323</FONT>            return false;<a name="line.1323"></a>
<FONT color="green">1324</FONT>        }<a name="line.1324"></a>
<FONT color="green">1325</FONT>    <a name="line.1325"></a>
<FONT color="green">1326</FONT>        /**<a name="line.1326"></a>
<FONT color="green">1327</FONT>         * Splits a string into a number of tokens.<a name="line.1327"></a>
<FONT color="green">1328</FONT>         * The text is split by '?' and '*'.<a name="line.1328"></a>
<FONT color="green">1329</FONT>         * Where multiple '*' occur consecutively they are collapsed into a single '*'.<a name="line.1329"></a>
<FONT color="green">1330</FONT>         * <a name="line.1330"></a>
<FONT color="green">1331</FONT>         * @param text  the text to split<a name="line.1331"></a>
<FONT color="green">1332</FONT>         * @return the array of tokens, never null<a name="line.1332"></a>
<FONT color="green">1333</FONT>         */<a name="line.1333"></a>
<FONT color="green">1334</FONT>        static String[] splitOnTokens(String text) {<a name="line.1334"></a>
<FONT color="green">1335</FONT>            // used by wildcardMatch<a name="line.1335"></a>
<FONT color="green">1336</FONT>            // package level so a unit test may run on this<a name="line.1336"></a>
<FONT color="green">1337</FONT>            <a name="line.1337"></a>
<FONT color="green">1338</FONT>            if (text.indexOf('?') == -1 &amp;&amp; text.indexOf('*') == -1) {<a name="line.1338"></a>
<FONT color="green">1339</FONT>                return new String[] { text };<a name="line.1339"></a>
<FONT color="green">1340</FONT>            }<a name="line.1340"></a>
<FONT color="green">1341</FONT>    <a name="line.1341"></a>
<FONT color="green">1342</FONT>            char[] array = text.toCharArray();<a name="line.1342"></a>
<FONT color="green">1343</FONT>            ArrayList&lt;String&gt; list = new ArrayList&lt;String&gt;();<a name="line.1343"></a>
<FONT color="green">1344</FONT>            StringBuilder buffer = new StringBuilder();<a name="line.1344"></a>
<FONT color="green">1345</FONT>            for (int i = 0; i &lt; array.length; i++) {<a name="line.1345"></a>
<FONT color="green">1346</FONT>                if (array[i] == '?' || array[i] == '*') {<a name="line.1346"></a>
<FONT color="green">1347</FONT>                    if (buffer.length() != 0) {<a name="line.1347"></a>
<FONT color="green">1348</FONT>                        list.add(buffer.toString());<a name="line.1348"></a>
<FONT color="green">1349</FONT>                        buffer.setLength(0);<a name="line.1349"></a>
<FONT color="green">1350</FONT>                    }<a name="line.1350"></a>
<FONT color="green">1351</FONT>                    if (array[i] == '?') {<a name="line.1351"></a>
<FONT color="green">1352</FONT>                        list.add("?");<a name="line.1352"></a>
<FONT color="green">1353</FONT>                    } else if (list.size() == 0 ||<a name="line.1353"></a>
<FONT color="green">1354</FONT>                            (i &gt; 0 &amp;&amp; list.get(list.size() - 1).equals("*") == false)) {<a name="line.1354"></a>
<FONT color="green">1355</FONT>                        list.add("*");<a name="line.1355"></a>
<FONT color="green">1356</FONT>                    }<a name="line.1356"></a>
<FONT color="green">1357</FONT>                } else {<a name="line.1357"></a>
<FONT color="green">1358</FONT>                    buffer.append(array[i]);<a name="line.1358"></a>
<FONT color="green">1359</FONT>                }<a name="line.1359"></a>
<FONT color="green">1360</FONT>            }<a name="line.1360"></a>
<FONT color="green">1361</FONT>            if (buffer.length() != 0) {<a name="line.1361"></a>
<FONT color="green">1362</FONT>                list.add(buffer.toString());<a name="line.1362"></a>
<FONT color="green">1363</FONT>            }<a name="line.1363"></a>
<FONT color="green">1364</FONT>    <a name="line.1364"></a>
<FONT color="green">1365</FONT>            return list.toArray( new String[ list.size() ] );<a name="line.1365"></a>
<FONT color="green">1366</FONT>        }<a name="line.1366"></a>
<FONT color="green">1367</FONT>    <a name="line.1367"></a>
<FONT color="green">1368</FONT>    }<a name="line.1368"></a>




























































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